9*77+11*37 要怎么简便计算啊?

问题描述:

9*77+11*37 要怎么简便计算啊?

=10*77+10*37-77+37
=770+370-40
=1100

9*77+11*37
=9*7*11+11*37
=11(63+37)
=11*100
=1100

9*77+11*37
=(10-1)*77+(10+1)*37
=770-77+370+37
=770+370+37-77
=770+370-(77-37)
=1140-40
=1100

提出公约数11*(63+37)=1100

=11*(9*7+1*37)
=11*100
=1100

9*77+11*37=9*11*7+11*37=11*(63+37)=11*100=1100

9×77+11×37
=9×7×11+11×37
=63×11+11×37
=(63+37)×11
=100×11
=1100

9*7*11 11*37 『7*9=63』 (63 37)*11 100*11=1100