9.7ᘧ࿾25的简便方法

2025-06-22 19:13:55
推荐回答(3个)
回答1:

解: 9.7✖️25
=(10-0.3)✖️25
=10✖️25-0.3✖️25
=250-7.5
=242.5

回答2:

9.7x25
=(10-0.3)x25
=10x25-0.3x25
=250-7.5
=242.5

回答3:

9.7×25
=9.7×100÷4
=970÷4
=242.5