(2⼀15+3⼀4+5⼀12)乘60简便运算 5⼀27乘(1⼀4+1⼀5)简便运算 7⼀4乘17-

(2/15+3/4+5/12)乘60简便运算5/27乘(1/4+1/5)简便运算7/4乘17-3/4
2024-12-03 15:35:22
推荐回答(1个)
回答1:

(2/15+3/4+5/12)乘60
=2/15乘60+3/4乘60+5/12乘60
=8+45+25
=68

5/27乘(1/4+1/5)
=5/27乘1/4+5/27乘1/5
=5/108+1/27
=5/108+4/108
=9/108
=1/12

7/4乘17-3/4
=(1/4)(7×17-3)
=(1/4)×116
=29