口算訓(xùn)練（一）100427

1、口算練習(xí) (一)÷= × 1× ×÷×5×4 ×13×0 9÷ 8÷ ()÷ 1 4÷ ÷ ÷6×× 0.25×5.425%×4.65.44.46 10.01 2120% 225%1÷75% 75%×× 8.1×1018.10.1×0.1÷0.1×0.1 31 ()×1216.43(7.432.5) 100.02 12×

2、; ×99 ÷12 ÷÷ 6÷26×2÷1%2 21% 20%6.3÷0.21 3÷3% 32.7口算練習(xí) (二) × 1 210.6 ×4.9 1 ÷0.8 20% ×÷× 0.32=÷ 1 19÷910÷9 ÷20 8× 3÷7 ×02.4×5 4.3÷0.01 0.713 4.5×1000 ()×42 55× 5÷

3、;5% 7×8×() ÷1 5.10.09150.15 13299 5 1.25×88400÷25÷8 753199 × 103×9.8口算練習(xí) (三) 0.50.27 99111 11%0.25 0.920.7 100189 3511% 1.25 2.383.237.62 ×101×2×÷× 2.753.91.752.10.8××1.25 × ÷ 0.125×4 8÷1.25 120÷535&#

4、215;7 ×99 24×()()×12 9.9÷0.8÷12.5 ×× ×12×2 8.8×1.2544×0.25 ÷× ()×63125%36%0.75 48699 547198口算練習(xí) (四)0.770.33 × ÷3×50% 7.040.4 3.220% 0.9×990.90.31÷3.1 4÷0.25 9.86 70%0.331.7 × 910÷70 ÷35

5、0×0.02 2÷4% ÷19 0.25×12 ()×12 30.2×÷ ×× 0.25××4 × ×÷5 ÷75%×3.14×0.12 1÷÷1 ×9÷×9×6 ÷×3 0.45×8÷21÷13 ()÷ ×÷76.38(1.92.38) 3÷7口算練習(xí) (五)2.8×

6、0.4 1.92÷0.04 0.32×500 3.5×200 0.75÷15 0.4×0.8 4×0.25 0.361.54 1.01×99 7.5(2.53.8) 32.8÷19 5.2÷1.3 1.6×0.4 4.9×0.77.26(5.261.5) 286198 × 3.3755.752.756.625 30× ×12× × ×25× 95.6×1.895.6×8.2 ×52

7、47;82%×0 23×× 15%25% 390×0.02 ×36 10÷0.654.35 0.51÷17口算練習(xí) (六)0.770.33 3.6÷0.36 26.26÷26 2700÷90 0.875×8 13×14 23.2×2.5 7.228 636198 ×3.14×5 4÷ 660÷11 500×0.0013÷ 0.875 0.75×16 126.23.89÷156×

8、 × ×××× 13×(2) 78.5×9978.510.75(0.753) × ×76125%35% 0.10.9÷3 1.51.5×0.3 33 7.9×117.92000250×4 1 ×8×2× 1.8×4×0.5口算練習(xí) (七)639198 96÷2.4 1001.01 18.20.2824×0.25 0.42 3.5×0.2÷ 1÷ 20% 90.090.

9、528% 12÷50% ×8 × 25÷12.5% 0.1×2%5.4×995.4 72×9.97.2 3.7×5×0.2×× 445 12.5×25×32 (0.28)÷7 1÷(10.2)1000÷25×81 5.444.6 1234÷25÷47 6(3) ×÷ 1÷0.12536÷15 ÷ 1001% ÷ ÷口算訓(xùn)練(八)151.4= 20698= 44.444.4= 4= 1÷= 1+2%=81.4+3.25= +1.75= 5.6÷0.28=0.2+= ÷= ×0.25= 0.42×=0.08÷0.4= a+a= a×a= a÷a=a0= 1÷a(a0)= ÷=3×3×= 4×1.2×25= 125×16=1.3×0.7+0.3×1.3= 15×2.615×1.6= 101&#