1⼀4乘19+3⼀4乘27怎样用简便方法计算

2025-02-26 04:59:44
推荐回答(1个)
回答1:

1/4×19+3/4×27
=1/4×19+1/4×3 × 27
= 1/4×19+1/4×81
= 1/4×(19+81)
= 1/4×100
=25