梯等式计算 3/4×3/5+2/5×75% [7/8-(3/4+1/12)]÷3/8
梯等式计算 3/4×3/5+2/5×75% [7/8-(3/4+1/12)]÷3/8
日期:2022-03-31 16:52:50 人气:1
3/4×3/5+2/5×75%
[7/8-(3/4+1/12)]÷3/8
=9/20+2/5×3/4
[7/8-5/6]×8/3
=9/20+3/10×1/24×8/3
=9/20+1/30
=29/60
[7/8-(3/4+1/12)]÷3/8
=9/20+2/5×3/4
[7/8-5/6]×8/3
=9/20+3/10×1/24×8/3
=9/20+1/30
=29/60