2100除35怎么用简便方法计算

2025-03-04 11:44:44
推荐回答(4个)
回答1:

原式=2100/70*2=30*2=60

回答2:

2100÷35
=7*300÷(5*7)
=300÷6
=50

回答3:

2100÷35
=(21×100)÷(5×7)
=(21÷7)×(100÷5)
= 3×20
= 60

回答4:

2100/35
=300*7/(7*5)
=300*7/7/5
=300/5
=60