3.2×3.4 15.8×3.2 3.2的简便计算记得要简便计算!
问题描述:
3.2×3.4 15.8×3.2 3.2的简便计算
记得要简便计算!
答
(3+0.2)*(3+0.4)=
答
3.2×3.4+15.8×3.2+3.2
=3.2×(3.4+15.8+1)
=3.2×20.2
=3.2×(20+0.2)
=64+0.64
=64.64