简便计算：7×16.5+24.7×78.6+24.7×4.9=3200÷125÷8=

24.7×16.5+24.7×78.6+24.7×4.9
=(16.5+78.6+4.9)×24.7
=100×24.7
=2470

3200÷125÷8
=3200÷(125×8)
=3200÷1000
=3.2

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
满意请采纳答案，不懂可追问。谢谢！

=24.7*（16.5+78.5+4.9）
=24.7*(95+4.9)
=24.7*(100-0.5)
=24.7*100-24.7*0.5
=2470-12.35
=2457.65

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

明白请采纳，有疑问请追问！
有新问题请求助，谢谢！

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