简便计算：7×16.5+24.7×78.6+24.7×4.9=
问题描述：
简便计算：7×16.5+24.7×78.6+24.7×4.9=
3200÷125÷8=
答
24.7×16.5+24.7×78.6+24.7×4.9
=24.7×(16.5+78.6+4.9)
=24.7×100
=2470
3200÷125÷8
=3200÷(125×8)
=3200÷1000
=3.2