32.8×6.4+1.4×25.4+58.2×3.6简便计算
问题描述:
32.8×6.4+1.4×25.4+58.2×3.6简便计算
答
将58.2拆成(32.8+25.4)
32.5×(6.4+3.6)+25.4×(1.4+3.6)
=32.5×10+25.4×5
=5×(65+25.4)
=90.4×5
=452