98乘7加56用简便方法计算

2025-03-22 04:24:00
推荐回答(5个)
回答1:

回答2:

98*7+56
=(100-2)*7+(100-44)
=100*7-2*7+100-44
=700+100-14-44
=800-(14+44)
=800-58
=742

回答3:

=98×7+7×8
=7×(98+8)
=7×106
=742

回答4:

98×7+8×7
=(98+8)×7
=106×7
=742

回答5:

一步一步算