用简便方法计算770÷30,5600÷400.9800÷320竖式计算?

2025-04-14 19:04:06
推荐回答(1个)
回答1:

770÷30
=77÷3
=(78-1)÷3
=78÷3-1÷3
≈26-0.33
=25.67

5600÷400
=56÷4
=14

9800÷320
=980÷32
=490÷16
=245÷8
=(240+5)÷8
=240÷8+5÷8
=30+0.625
=30.625