56.5X9.9十5.65X1简便算法

56.5X9.9十5.65X1简便算法
2024-12-01 22:49:11
推荐回答(4个)
回答1:

56.5X9.9十5.65X1
=56.5X9.9十56.5X0.1
=56.5X(9.9十0.1)
=56.5X10
=565

回答2:

56.5X9.9十5.65X1

=56.5X9.9十56.5X0.1

=56.5X(9.9+0.1)

=56.5X10
=565

回答3:

56.5X9.9十5.65X1

=5.65*99+5.65*1
=5.65*(99+1)
=5.65*100
=565

回答4:

9.9写成10-0.1