脱式计算.0.8×(12.5+

脱式计算.0.8×(12.5+1.25)7.75×[20÷(3.24-3.04)4.05÷0.81+2.4.
2024-12-02 10:33:30
推荐回答(1个)
回答1:

(1)0.8×(12.5+1.25)
=0.8×12.5+0.8×1.25
=10+1
=11;

(2)7.75×[20÷(3.24-3.04)
=7.75×(20÷0.2)
=7.75×100
=775;

(3)4.05÷0.81+2.4
=5+2.4
=7.4.