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7.5×3.5 0.75×35=?用简便计算

7.5×3.5 +0.75×35 =7.5x(3.5+3.5) =7.5x7 =52.5

这个题目应该是你写错了,第一个的3.5,应该在出题的时候是0.35,这样才是符合简便计算的。 75*3.5+0.75+7.5*6.4 =75*(3.5+0.01+0.64) =75*4.15 =311.25

5.6x7.5—3.5x5.6 =5.6x(7.5-3.5) =5.6x4 =22.4

原式=3.14X(7.5+3.5-1) =3.14X10 =31.4

7.5x2.4+2.4x2.5 =2.4×(7.5+2.5) =2.4×10 =24 3.72x3.5+6.28x3.5 =3.5×(3.72+6.28) =3.5×10 =35 (4+0.4)x2.5 =4×2.5+0.4×2.5 =10+1 =11 4.2x0.5-1.6x0.5 =(4.2-.1.6)×0.5 =2.6×0.5 =1.3

2.3×7.5 3.5×2.3一2.3 =2.3×(7.5 3.5-2.3) =2.3×(括号里算出来) = 很抱歉,你题目没给完整,还是这是两道题?所以无法解答,不过,你可以根据我的思路解答。 希望能帮助你O(∩_∩)O~

3.5*7.8-7.8+7.5*7.8 =(3.5-1+7.5)*7.8 =10*7.8 =78

6.9×7.5-6.9×3.5的简便算法 6.9×7.5-6.9×3.5 =6.9x(7.5-3.5) =6.9x4 =27.6

44.1除以3.5减7.5 =44.1÷7÷0.5-7.5 =6.3÷0.5-7.5 =12.6-7.5 =5.1

65x0.75十3.5x7.5 =65x0.75十35x0.1x7.5 =65x0.75+35x0.75 =(65+35)x0.75 =100x0.75 =75

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