(12+4/5)×(6+2/5)+(8+3/25)×64 简算
问题描述:
(12+4/5)×(6+2/5)+(8+3/25)×64 简算
答
(12+0.8)×(6+0.4)+(8+0.12)×64
=12.8×6.4+8.12×64
=12.8×6.4+81.2×6.4
=6.4×(12.8+81.2)
=6.4×94
=601.6