簡便計算題大全四年級

158+262+138375+219+381+2255001-247-1021-232(181+2564)+2719378+44+114+242+222276+228+353+219(375+1034)+(966+125)(2130+783+270)+101799+999+9999+999997755-(2187+755)2214+638+2863065-738-1065899+3442357-183-317-3572365-1086-214497-2992370+19953999+4981883-39812257524138254(13125)(38)(12+24+80)5070425253212532(25+125)88125102765898178101-1788436+64847599+27583102-8329819912318-1233+8512350(344)325(24+16)17899+1787942+79+795773002548100475168001203010021003200040049700700124824315015480025215001252356-(1356-721)1235-(1780-1665)7527+192 531870+133104(2565+2528)(1)(78+61)+39 (2)700-82-18(3)348+163+242+410+537(4)12547-4725 (5)201316(6)374-205+226-95 (7)3000-999(8)9977+21 (9)87470+87053(10)(55+55+55+555)125(11)125(8+40)25 (12)99+4999(13)26497+4264(14)454+999999+545(15)999936+6666332(16)12438+65124+76110-767(17)624+445+518(18)3400-6234-3820-3814(19)199219911991-199119901990(20(2+4+6+100)-(1+3+5+99)1. 2.73 + 0.89 + 1.272. 4.37 + 0.28 + 1.63 + 5.721. 10 - 0.432 - 2.5682. 9.3 - 5.26 - 2.743. 13.4-(3.4+5.2)4. 14.9-(5.2+4.9)5. 18.32 - 5.47 - 4.326. 17.29 - 5.28 - 6.291. 25 6.8 0.042. 0.25 32 0.1253. 6.4 1.25 12.51. 0.45 2012. 0.58 10.13. 50.2 994. 4.7 9.95. 3.28 5.7 + 6.72 5.76. 2.1 99 + 2.17. 1.7 9.9 + 0.178. 23 0.1 + 2.3 9.91. 0.18 +4.26 -0.18 +4.26 2. 0.58 1.3 0.58 1.3 3. 7.3 4 + 2.7 0.25 4. 3.75 0.5 - 2.75 2 5. 5.26 0.125 + 2.74 8 a b c = a (b c)6. 6.3 1.87. 4.2 3.58. 9.5 (1.9 8)9. 12.8 (0.4