Question

0.38×3/8+0.62×0.375用简便计算怎样计算？

Answer 1

0.38×3/8+0.62×0.375=3/8

Answer 2

根据题意先把3/8化成小数为0.375，那么0.38*3/8+0.62*0.375=0.38*0.375+0.62*0.375=（0.38+0.62）*0.375=1*0.3750.375。

Answer 3

0.38×3/8+0.62×0.375
因为3/8就等于0.375,所以这道题可以用乘法分配律来计算
0.38×3/8+0.62×0.375
=0.38×0.375+0.62×0.375
=0.375×(0.38+0.62)
=0.375×1
=0.375

Answer 4

0.38x3/8+0.62x0.375
=0.38x0.375+0.62x0.375
=0.375x(0.38+0.62)
=0.375x1
=0.375
先乘后加，乘法结合律，分配律。

Answer 5

解：0.38×3/8+0.62×0.375
原式=0.38×3/8+0.62×3/8
=(0.38+0.62)×3/8
=1×3/8
=3/8