20以內(nèi)加減法、混合加減法口算題

1、2 +18=20-1 =18 T2=2+8=20-15=2+12=1 1 -1 0=7+ 1 =15 -8 =10-9 =18 -6=6+ 8 =2 0 6=19 -1 6 =20 8 =5 +11 =2+ 5 =8+6 =19-4 =2 0 1 =16 =2 +6 =3 +13=1 4 + 3 =20 - 5=1 7-7=1 0 +1 =1 +19 =3 +4 =20 18 =5+1 =1 7-16 =17 1 6=19-1 7 =14+2=1 0 1 =1 3 + 4 =7+13=5-1 =1 4 - 10=1 2 +5=20-1 =10違=15+ 5 =6 +11 =11 -2 =1 +

2、2=11+6=20- 1 =12+7 =1 5+ 1 =2 0- 3=1+8=1 9-10=12-10=1 9 -1 1 =2+ 7 =14 + 2=7 T =1 4+5=10 + 9=19 - 6=9 +5=6 -3 =1 8 T=16-7=15-12 =2 +1 0 =6 + 1 3 =9+8 =2+1 5 =9 +1 =1+12=1 1- 3 =6+ 3 =16-15 =14 -1 =8+ 1 2 =11+7=1 6-4=15 + 3=5+ 2=1 1 10 =1 0 +4=18 - 1 2 =9 - 4 =1 3 +7=3+3 =20 - 1 5 =1 +1 7 =1 9 1 3=1

3、9- 4=3 + 17 =1 7-7=14+ 2 =8 + 9 =3+5 =8+4=7 6 =4 + 4=10-4=17 + 3=8+2 =19-1 6 =1 0 - 2 =2+3=3+8=2-1 =14+3=1 4-6=3+1 =8 +4=1+ 4 =5+8=12 - 6 =4 + 1 0=17 +3=9+ 9 =20 -1 9 =1 2 + 6 =7 + 6 =17+3=8+7=5+ 1 3=11 -3=8+9=4 +12=20-18=1 +8 =15+2=3 + 15 =14+3=1 9 -5 =9 + 7=5 +13=12-3=1+14=5 +6 =13 -2 =9 +6 =1 + 1

4、8=1+ 5 =2 0 - 3=9-1 =2+1 =1 9 -12 =3 + 14 =1 7 - 10=17 - 9=16 - 1 4 =15-1 =1 33 =1+16=6 - 1 =1+8=11 + 2 =10+2 =9 +1 =18 -4 =4+12=7+4=9 8=9+10=14 -13=3+13 =15 -5=12-8 =10 - 2=10-1 =14 -3=9 -3=2+5=1 & 17=1 5 -2 =1 8 -5 =19-9=19 -18=6+1 4 =1 2 -2=7 +6=17 +2 =1 4+ 3 =18 -8 =3+5=1 2 + 1 =6+ 1 2=1 7 3

5、=9 +6 =9+5=1 2 T =10+1 =9- 4 =8 -6=1 3 -1 =19 - 15=9 +7=6 + 13=7-5=18-13 =18 T =11 -5 =14+ 5 =4+4 =6-1 =4+15=2+10=1 7 H3=1 5 +2 =7 + 10=18+ 2 =5 +4 =4 +7=2+14 =1 3 -4=10-9=13 + 5 =13 + 2=12 +8 =1 3 1 =3+ 7 =19-12=11+ 7 =16+1 =12+3=1 1 + 9=6+7=9 - 2 =5 + 6 =17 12 =155 =1 6 7=17-1 =1 6 4 =16 5 =16-15=

6、5 +2 =13 T =12 1 =1 8-14=7 + 7 =16 8 =4+5=1 &5 =6+ 7 =2+ 1 2=13 + 4=16+4=12 - 1 1 =9 +5=5 2=20 16 =20-1 3 =5+ 2 =7 2=1 7- 5 =13+6=10+9 =5+3 = 4 +2 0 - 19 =1 5 5 =17- 7 =1 2=10 -5=2 0 1 =9 +11 =1 5+ 5 =114 =5+ 8=1 5 - 2 =1 2 +1 =1+8=14 6=15 -5 =3+7 =1 6 -11 =1 7 -1 2 =16-1 5 =14-6=17 5 =5+ 9 =8 1

7、 =7 + 8= 3 +6 + 2 =12 + 4=6+ 13 =6 =6 +10 =7 +1 =1 2 +7=16 -6=1 4 - 9 =1 0 -5 =3+ 14=1 9 1 6 =18 -11 =19 -1114 + 6=2 +1 8=16-810-8=1 + 12 =8 +4=13 + 3=4 =1+9=1 4 5=8+1 =4+4 =7 + 2=1 6 -2 =3+11 =14 13=16+4=1 6-6=14+1 =6+1 2 =18 5=11 - 9=7 +12=12+5 =9+2=4 + 14=5+10=1 4 11 =16 7=2 + 6=11-913 2 =14 -6=1

8、4+3 =19- 8 =1 8-8=3+5=2 0 - 9 =9+6=11 -9=1 9 - 6 =1 3 =2+18=4 +11 =20 1 4=1+18 =3 +1 1 =1 9 8 =1 5 9 =7 + 13=1 0+8=1+ 7 =4+ 5=1 3 + 2=4 + 1 2 =1 78 =16 11 =17- 7 =14 13 =2 + 5 =1 4 +2=3 2=17 5=7+ 1 0=1 4-9=16-1 0 =8 +1 2 =5 + 6 =18-1 =11 10 =1 3+1 =1 8 T6=19 2=1 4違=13 10=18 2=2+13 =6 +8=13- 1 2=13-3

9、=8 +5 =19-4=19 - 1 8 =7-4 =6 + 13=1 + 17=20 6=7 =5-2=7 +3 =15+ 4 =1 4 8 =1 7 -6 =11 -2 =2+5=3+8 =8 1 =11+7=20-1 5 =2+ 1 7 =14 =11+1 =7+12=6+ 2 =2+10 =16 + 2 =19 4 =9-1 =1 1 8=8+12=1 7 + 2 =1 6 -4=1 0 8=9 4 =1 4+3=20 17 =1 2 +4 =4 + 4=19 1 1 =8違=7 + 13=3+5 =1 5 1 0=6+4=17+ 1 =7 -6 =15+ 1 =1 0-9=10+ 9

10、 =20-5=1 5-9 =16-4=6-2=1 + 17 =18 3 =1 0+1 0 =3 +2=5+10=1 2 +6=1 1-9 =18 5=1 2 10=1 5 1=18 5 =18 5 =6 2=1 7 - 1 =14 !=1 7 1 =1 5 -9=3+14=1 & 10=5+8 =6 5=1 +8=1 8 - 11 =1 5-8=9+6=3+1 6 =1 9 4 =2+3=1 +2=2+1 8 =3+ 1 0=10+5=15-13=1 + 15=4 5=1 0 =19-12=19- 1 6 =3+3 =8- 2 =1 + 6=2 0 3=13 8=7+9=5+ 2 =1

11、7-1 4 =12 9 =5+9=8 3 =14-11 =14+1 =18 - 6=19- 1 0=1 0 +10=14+2=20 1 =14 -8=11 2=1 3 -9=4 + 12=1 0 -2=7+8 =3-2=1 4 + 5=4+1 2 =1 8-7=1 8 4 =6 - 1 =20 -1 7 =1 + 2=7 +10=11 -8=1 2 + 4 =1 0 -2=5+ 9 =9-7=8 -7=5 + 9 =11 4 =1+19=19 10=17+3=1 4 6=2+17=2 0-7=2 0 4=1 +3 =15 + 2=6 +10=2 0-=6+6=7 -4=9+4=13+7=9 -

12、8 =1 5 10 =2+5 =7+9 =6 + 5=5 +1 0 =8+11 =5 -2=20-4=17-15=1 91 5 =14-3 =14 -3=1 4-3=4 + 1 5 =7 +1 =4+9=8 +9 =4 +6 =1 4-4=19 T4 =19 =13-=20 5 =1 4 - 1 0=14-5 =1 6 +2=9+ 3 =12-9 =16 -1 3=6 + 1 4=18 7 + 12=6+2=1 5 -2=4 + 16=20-13=1 7-3=17+ 3 =1+ 1 7=1 0 -2=1 4 1 =20-19=19- 6 =13- 1 =7 -1 =3 + 4=5 =2+14=

13、2 0-11 =10 3 =14 -5=2 0 -15 =20 8 =4 +5=19-18=2 +14=1 9-18 =4+10=3+15=6 -5=16-2 =12+ 2 =7 +2=5+2=7+5 =17 2 =15 5 =9 - 5=9 =12 7=20- 1 4=9-1 =6+4 =17 3=16 - 1 47+5=5+6=10 -5=19 8 =1 +2=12+8=18-11 =4 +1 2=2 + 1 =6-3=3+ 1 =1+8=14 T3=9 +7 =14 - 7=9+ 6 =12-5=9+11 =17-3=3+1 1 =3+ 4=1 0+3 =1+8=1 9 4=1 9 -

14、1 1 =4+1 2 =2 01 419 1 =1 6- 7=1 4 +6=10-7 =9+7=13+4=2 0 4 =3 + 11 =12-7=10+2=3 + 10=1 0 + 7=7 +1 2 =12+8=14 + 5=15 1 1 =11+1 =9+5 =16 2=7+1 0 =10- 8 =8+ 3 =3+4 =1 6 -14 =14 + 65+10=3+15=1 9 5=9+7=11 10 =1 3-2=1 7 +1 =14- 8 =1 +14=17 - 7=1 8T 7 =2 =5 + 12=17 - 4=6 +8 =7+8=6+3=8-1 =20 3 =20 -1 6=6+5

15、=1 7 -1 3=5 + 12=5 +2=14+ 1 =11 6 =4 + 11 =10+9=5+2=18 - 17 =18 1 6 =18 -6=15+3=15 - 6 =14 -8=14 -9=9+8=1 8+2=1+7 =20-7=1+6 =15+3=10-61 1 + 4=7 + 8=14+2=1 0 +9 =15 -6=2 0- 18=1 1 -10=4 + 11 =3+ 7 =5+ 1 =6 1 =1 8 1 0=15- 3 =10+ 5 =14 -10=20 -10=9 +6=2 0-1 =1 7 -5=3 +9 =18 2 =6+13=8 - 1 =1+ 7 =2+7=8+5

16、=2 + 13=14 - 3=7 +1 0 =13+ 2 =5 +5=16-11 =6+3=3+11 =3+11 =1 +17 =3 +13=3+5=1 + 1 4=1 7 -1 1 =4 + 3 =19- 1 =1 7 - 1 =9 - 2 =6+ 9 =15 -3=8 +11 =6 - 2=1 6-1 =1 6 -12=12-2=11 - 1 =1+1 1 =1 + 13=1 1+ 4 =2+ 1 2 =6 - 5 =16 - 5=1 9 -5 =19 T6 =7 +1 =2 0 -5 =2+ 1 5=13-9=20-8 =13 =3 +11 =4 + 14=1 3 -2=1 3 -6=1

17、3 5 =2 +4=8+7=11+2 =5+3=19- 1 =5+6 =1 0+ 1 0=1 0 +9=2+13=5 + 3=3 + 1 2 =5 + 1 3 =15+3=10 -4=12 -7=2+10=12 + 5 =4- 3 =1 1+ 4 =1 + 17=8+ 8 =7 + 1 0 =7 + 2 =9+6 =3+17=13-8=9 -3 =2 + 6=9+ 9 =1 0 + 5=1 5+ 3 =7+1 2 =11+5=7+7=6+3=11 -6=6 +13=6+ 8 =2 +13 =1 4-7=1 6 -2=14 1 =7 -3=18 3 =1 8 7 =1 7- 11 =8+3=9+

18、4=2 0-194+1 1 =8 +9 =4+3=1 + 19=5- 1 =10- 7 =10 + 9=12 0 =2 + 1 7=16-13=3+8=3 + 1 =1 +6 =5+ 4=1 3+4 =15 - 2=1 1 -7=2 0 10 =1+ 6 =1 9 -11 =10+6 =2+18=16 -9 =1 6 -4=1 + 10 =5+1 2 =4+16 =1 7 - 13=9 + 11 =6 + 8 =1 7 + 3 =20-7 =14-3=5- 2 =1 3 + 3 =20-5=4 - 2=9 + 3=1 7 - 15 =4+1 =1 7 -3=11 -4=1 2 + 7 =1 2

19、 +1 =9 + 8=5+4=4+1 =1 3+4=6+7=17 - 7=1 1+8 =15 - 13=1 6 1 1 =1 4-8=2 01=15 =11- 9 =6 +8 =13 -11 =2+ 5 =7 +10=14 -6=20- 9 =1 2 8 =18 2=10 4 =2+6+2 =5+3 + 2=4+0+ 3=10-379 -3 6=10-1-4=7 2+4 =+2-6=10-4 +3 =+ 6 8=8 7+1 6 =6+10- 5=1 94 5=108+3=7+8 4=5+ 8 3=2+3 +7=9+ 76=7-4+7=8+1+6=111+5=74+8=83+8=9 + 9 7=

20、8+7 5=6- 2 +7=22=9+4 3=11-0 + 7=4+ 1 +4 =8+6 + 4=8+ 9 6=91 + 7=4+1 + 6=8+8 -8=11+77 =8 2+8 =1 9 -4-4=8+6 4=165 1 =9- 0 + 5=4 2+9=1 4-4+1 =62 + 8=8 + 4-10 =6 +9 5=4+11-4 =7 -0+6 =9-8+ 6 =9+2+4=4+8+3=5+ 9-1 0 =2 1 +1 2=9+ 87 =1 8 -3 5=9+4 3=+ 0 39-8 +6 =9-3+ 6=?6-4+9=5+ 9 1=0+ 2+8=15-3-2=12 +2-1 =11+5

21、6=5-3+ 9 =742=+31=8 8+4=1 9 9+5=9 6+3=+6 +7=1610+9=4+68 =12-10+2 =+9 8=1 8 -1 23 =4+ 96=1612 4=121 +3=1312 +7 =6 +9+ 2=121 0+4=14+4 1=1831=2 +8+5=1 7-13+4=17-4+1=7+38=15-141=11 +56=17 1 f+ 6=1 4-4 + 3 =8 +8-9=156+2=12+5 -9=1 08 +9=1 1 2 +3=12-3+4=16 7 3=1 1 3+5 =166 5=15 6-4=1 45 -4=026=189+7=1 3+59

22、=13-9 +7 =14-4-3=18-82=+ 2+1 =664=1610+4=3+7+ 5=4+4 +4=5+4+5=4+ 0 +6=66 9=8+ 3+2 =19-6 9=66145+5=16-6+4=11-9+ 1=12-8 3=129 -2=147+7 =12-4 +5 =8+2+5=166 +3=16-6+7=12+3 5=8 -3+10=6+4 3 =4 +6 +5=83 5=4+6=+ 6=+3+2=64=3+4+7=8- 8 2=12 37=16 10+4=3+5+7=8+21=7-2+5=5+4+5=19-69=13-7 +5=13 7 -3=76+9 =3 +2+5 =3

23、+6+7=44+4=969=+9 +7=6+ 9+4 =4+0+6 =16-66=10-18=25 -5 =5+45=1669=17 73=5+9+ 5=13+7-5=16-10+4=132+ 5+8=9+2+1=14-4+ 6=1454=13 6-4 =20 103=7+& 1 0=+94=102 +7=16-6+ 9 =871=8+7-5=17-2 -3=24+92=1+1 + 3 =17- 1-1 =4+3 +4=209-4=1 76-8=2+5+4=64+2=-18=19-10-5=15-3- 4=0+61=032=9+1 + 7 =36- 6=193-6=1 4-1 =8-9

24、- 5=33-3=5-22=4+5+3 =0-37=19- 4- 8=17-210=37+1=2+6+6=0-5-5=20-1-3=0+1+9=11 1 1=16-4- 5 =1 4 1 0 -2=163-2=1+58=13 6-4=1 7412=1429=18-1 9=1625=6+102 =3-2-5=20-5-11=82+4=5-8 7=3-3-10=99 +1=11+4+6=4+6 +5=4+8+5=42 +7=62+3=20 7 5=1 8 -3-1 =20-8-2=12-2-1=111-72 =1838=15-5 3=9+47=2010 8=7 7- 5 =17-4 -9=3+1+

25、4 =4 +4+6 =5+5+1=2+4+7=13-66=+7+ 6=+6+2=3+8+9=1 6 1 0 6 =+10+2 =16-17=2067=5 +7+8 =192-7=5+ 3 +9=1+10+3=2+8 +5 =9-25=1 1 +8+4=3+4+5=9+3+ 7=12 9-1 =5+9 + 5=11+3+2=16 4-4=+2+10=4+7+2=9+2+7 =+5 +4= 8=1685+6 + 8=4=14-9 2=1979=5+9+4=824=1=5+4+10=3+ 9+10=2+10+5=6+7+3=15-3 -8=1965=10 8-2=9-10 7=8-62=196-1

26、37 6 5=1615-4-1018106=8+1+7 =7+ 7+6 =3+10 +5=3+4+ 5=10-5+4+4=2 0-3 6 =8 +7+2 =111-8 =71+3=5+9+5=3+6+4 =-25=+ 6+ 2=10+ 7+1 =18-7-10=6 +7+1=1674=1892 =1753=2+7+38+ 7+2=1722=177 2 =20 1 05=4 +5 +3=+6+6=14 3-6=202- 9 =7+2+7=1 5 -45=2+3+9 =2 0 -4 -4=16-6-2=+5+3=1-31=11 5 5=0-43=13-44=7+5+ 2=4+6+5=7+6 +1

27、=95-9 =4+1+53+8+3 =71 5=111-1=2-54 =10+ 3+4=19-3-10=4+7+ 2=1+10+8=16-43=9+4+ 6=8 -4=1 8 2 -3 =9+2 +4 =18-32=1636 =191 09=8+ 7+ 2=132-5=+3+6=+8+5 =11 38 =+3+5=8+2 +4 =18-42=+3+1=12-3 -2 =64 -1751 0 =6-48 =4 +5+8=1332=2+58=1 9 -86=18410 =2+5 +4 =9+ 6 +5=15-2 6=2+9+6=18-69=196=2+2+10=8 33 =56 1=12+7+2=

28、188+ 7 +3=1 665 =1 9 -4-8=6+4+9168 4=15-29=2 0 54 =1 33-5=20-8 6=1 4-83=1 65-35+8+ 3=8+5+3=20-65=18 524+ 9+7=3+8+ 5=1276=6+2+10=18-5-3=1 2-10 1=1846=16-3-9=17-58=2+7+6=197 -2=10=374=7+101=9+3+4 =94 6 8=10+2 + 3 =17-2 5=14-9 4+2+6=18-26 =5+5+4=194- 10=-8 =187-1=6+9+3=3+6+6=168-5=+5=76 -8=5-5-1=4+ 7+8

29、=7+9+3=9+6+4 =- 3=2 +6+4=5+10+2 =7+6+4=4+ 3+7=1 78-4 =1 1- 7-4 =6+3 +7=7+9+1=1 381 3 -55=3+8 +42+1 0+3=3=18-5+7+4=958=4+94+6 +8=4-57=7+2+6=4-9 =+4+8+3 +6=14- 10-2 =5+2+6 =1 8 -6-7=1 9 -8-4=8+ 2+6=18- 92=5+3+8=3+8+3=17-1 2- 5=1829=6+ 1 + 7=1 6 -2- 55=10-1-9=1 6 -1 - 9=2+6+13=8+6 8=166-1 =104 4=11 54

30、-7=?194 3=+4+1 =476=7+1+9 =12-3- 8=169-5=15-11-3=124 7 =4 +6+4=19-8 -4=1 6 22=189- 8=+3+6=94+5=+8 +7=8+8+3 =2+10+3=4+5+2=5-1-3=633=+6+4=6+6+1=14-16=2-5-3=1+4+9=14-121=1 9 58=11+6+1=0- 2-8 =4+ 3+7=5+5+73+7+4 =47=5+7 +3=15-2-5=10-5- 3=19-96=2047=+6+7=5+4+10 =17-2+9 + 5 =17- 25=84- 1 =3+ 8+3=9-4 6=0- 3

31、-4=154- 4=1 467=16-7-3=183 6=7+9+1=184-3=9 +2 +6=7+ 2+6=6+8+5=13-3 1=149-5=16 1 6=23 1=1+1 0+ 6=8+7+1=4 + 8+4=921 -4 6=128 4=209 - 2 =12-4 =13-65=1 91-1 0 =2 +7+ 6=16 5 4=1017 =5+6+9=168-1=4+7+5=4+3+3 =1 571=8+ 3+5=15 32=10+3+3=196 1=21 9 2=15 8-5= 13-24=2035=19 32 =7+7+ 5=16-6 1=5+4+ 2=2+5+3=7+1+9

32、=5+3+8=11 65 =18-2 -2 =5+8+3=1+3 +8=4+7+1=1 3 -54=9 +5+1 =17 3-9=1 3 -34 =10+6+2 =15-43=19-3-1=12-22=1 1 1 0 -1=7+2+9=1+10+5=12 - 3 -7 =7 +2 +2=5+7+3=1-52=4+1 +7 =1915-4 =5+4+9 =7+8+7=175-8=24-2=10-8 1 =9+9 +2=1672=1 55-4=18-91 =1958=11-47=19-7 -8=1873=1 2 9-3 =171 01 =11+3+73=12-18=1 + 7 +9=3+8+527

33、=174-3=2+49=21+8=83+3=6+9+2 =8+41=42-62=065 =56+7=268=62+5=9 76=5+ 3 +4=7+9+4 =4 1-5=17-6-10=5+41789=1732=19-82=13-6-5=176 -3=3-22=1+5 +2=5+8=5+4+ 10=1 -38=134 4 =468 =10-18=20-9-3=6+ 4+9=3+ 6+3=6+2=0+ 5+5 =15-2 6=1 5 64 =4+4+5=1 5 -5 - 2=3+5 + 6=3+11 +4 =1 43-6 =6+7+5=13-7-6=8+ 3 +5=1376=19-9-7=1 4

34、 - 7 -2=+10+2=15+2 +2=3+7 + 8 =8+5+5=10+5+ 2=15 68=3+4 +2=3+9+3 =4-48=11 3 -1=1921 = 1-1 6=6+34=15-33=4 + 1 +9=3+8=1910-4=14+ 1 + 5 =19-6-5=16-96=4+5 +7 =3+5 +2 =152-3=17-6 5=8-66=14-9 3=195-3=6 -7-8=20 -52=139-4=137 -3=9+1+4=+ 2+10=42 1 =12+4+4=7+2+ 9=12-7 -2=5+4 +8=12-2 -4 =6+8+3 =8+8+1=188 5=142

35、6=2 1 02=18-4 7=-6=1693 =4+10+6 =3-8-4=+7 +3=1063=1 0+4 +1 =20- 9 -8=73=1 4 -31 0=1+8 + 6 =9+9 + 2 =6+9 +4=2+8+ 9=+6 +2=15 3-8=9 -5 -6=17 3-8=3+7+ 10=2+7+4=205-2=10 +3 +1 =+2+7=4+6+9 =10+2 +4=1 5 5 -7=18 9-6=1 9 1 8=8-58=203 8 =1465 =1-15=74=+9+ 2=1 9-8-1 =19-5-7=18-7-7=197 -5=16 -71=5+6+7=11-2 2 =9

36、+ 3+ 4=2+6+ 10-5=62-9=177 -6=151 -9 =10+8+2=9+2 +6=2=71-9=4+4+ 3=2+ 6+3=2014 =0-48=8+4+8=-1 0 -5 =1 34 -1 =6+5+1=15-1154 -2 =19-45 =1151 52 -1 0 =416310=8 + 6+ 7 =15-6-7=4+9 +1=1 1 8-1=1 9 8-2=1 77 9=13-4-3=+3 +1=+ 4+ 3=9+7+4 =8+8+3 =18-57=4 +4+ 10=1+9+10 =9+2+1=6+6+ 1=?4+9+ 1 =20-8一 6 =8+ 10+1=4+6+

37、9 =11+4+3 =6+ 5+3=18-6一 7=+1 0+4=2-72=17-105=2+10+ 4=16-47=2+ 6+5=17-7一1=19-2一 1 =+ 2+ 8=4+11+ 2=3+5 +8=20-10一 5=+1+6=+6+6=1510一 4=3+8+2=13-5一 6=162-1 =14-52=104=20 1 75+4+3=1=4-74=184 6 =1+8+8 =910-8=01 7 =1 76-4=4+2+6=4 + 5+7=16-8 - 6 =1+4+10=1+12+4=7+3 +6=9+ 2+7=1 4-8 -2=6+4+6=16-6-6= 1+10 +7 =19

38、-56=1 324 =?5+9+4 =6+ 9 + 4=15-3-7=5+ 6+9=7 + 6+5 =13 -1-7=1 74-5=4+ 8+4=1712 3=5 +1+7=20-2-8=18 3-9=19-4-1 2 =18-99=1 0+6+3=2+3+8=9+5+3=3+ 4+ 8=4+1 0+1=15 5-6 =5+8+ 2=1 0 +5+2 =7+ 2+4=14-59=13 2-9=7+9+2 =17 4-8 =19-1 0 4=172 7=15-6-3=19 97=6+7+5=11-44=203 10=15 8-5= 11 +1+3 =3+ 8 +7=3+7+5=19 3- 2 =13 10 2=18-35=19-6 9 =1 255=13-4 +()+8 =1417()=7