7.8X99 7.8简便计算?

2024-11-21 05:22:10
推荐回答(3个)
回答1:

7.8×99+7.8
=7.8×(99+1)
=7.8×100
=780

回答2:

7.8×99+7.8
=7.8×(99+1)
=7.8×100
=780

回答3:

7.8x(99+1)=7.8x100 =780