(3/8+4/5-7/10)×40
问题描述:
(3/8+4/5-7/10)×40
答
(3/8+4/5-7/10)×40
=3/8×40+4/5×40-7/10×40
=3×5+4×8-7×4
=15+32-28
=19
利用的是乘法分配律
答
=3/8×40+4/5×40-7/10×40
=15+32-28
=19
答
(3/8+4/5-7/10)×40
=3/8×40+4/5×40-7/10×40
=15+32-28
=19