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七点九八除以三点二的简便计算:

7.98÷3.2 =79.8÷32 =79.8÷8÷4 =9.975÷4 =2.49375

三点五乘七点八除以三点九用简便方法计算 3.5×7.8÷3.9 =3.5×(7.8÷3.9) =3.5×2 =7

九点零七-二十二点七八除以三点四有没有简便算法 9.02-22.78÷3.4 =9.02-6.7 =2.32 没有简算 直接计算

9.32×93.2+7.8×9.32-9.32 =9.32×(93.2+7.8-1) =9.32×100 =932

1.8*6.9+2.2*6.9 =(1.8+2.2)*6.9 =4*(7-0.1) =4*7-4*0.1 =28-0.4 =27.6

七点八一乘四十九减七十八简便运算七点八一乘四十九减七十八 =7.81*49-78 =382.69-78 =304.69 直接计算

(7.2×2.4-9.48)÷0.25 =(17.28-9.48)÷0.25 =7.8×4 =31.2

(7.2×10)÷(0.8×10)=9

把七点八化为分数

简便计算 7.8×199+7.8 =7.8×(199+1) =7.8×200 =1560

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