脱式计算: 3/5×(2/3+5/4) 4/5÷7/4×35/8 12/7÷(2/3-1脱式计算: 3/5×(2/3+5/4) 4/5÷7/4×35/8 12/7÷(2/3-1/4) 谢谢!

来源:学生作业学帮网 编辑:学帮网 时间:2024/07/04 02:34:27

脱式计算: 3/5×(2/3+5/4) 4/5÷7/4×35/8 12/7÷(2/3-1
脱式计算: 3/5×(2/3+5/4) 4/5÷7/4×35/8 12/7÷(2/3-1/4) 谢谢!

3/5×(2/3+5/4)
=3/5x2/3+3/5x5/4
=2/5+3/4
=23/20
4/5÷7/4×35/8
=16/35x35/8
=2
12/7÷(2/3-1/4)
=12/7÷5/12
=144/35

22/25 2 144/35