7.9×12.5+1.25巧算

2025-02-28 02:59:47
推荐回答(2个)
回答1:

7.9×12.5+1.25
=7.9×12.5+12.5x0.1
=(7.9+0.1)x12.5
=8x12.5
=100

回答2:

7.9×12.5+1.25
=12.5×(7.9+0.1)
=12.5x8
=100