Question

17×99125×98怎样用乘法分配律？

怎么用乘法分配律？

Answer 1

凑整法结合乘法分配律进行简算
17×99125×98
=17×99125×（100-2）
=17×9912500-991250÷5
=17×9912500-198250
=(20-3)×9912500-198250
=991250000÷5-9912500×3-198250
=198250000-29737500-198250
=198250000-29935750
=1698284250

Answer 2

17×99+125×98
=17×（100-1）+125×（100-2）
=17×100-17+125×100-125×2
=1700-17+12500-250=13933