5⼀18*3⼀7*3⼀5 3⼀4*2⼀3+1⼀6 8⼀9*3⼀4+5⼀6 7⼀8-4⼀7*7⼀16 2.3⼀7与5⼀21的和的14倍是多少?3.3⼀7与21⼀5的14倍的

的和是多少?计算题能简算的要简算
2024-12-02 16:14:43
推荐回答(1个)
回答1:

5/18*3/7*3/5
=(5×3×3)/(18×7×5)
=1/14

3/4*2/3+1/6
=1/2+1/6
=3/6+1/6
=4/6
=2/3

8/9*3/4+5/6
=2/3+5/6
=4/6+5/6
=9/6
=3/2

7/8-4/7*7/16
=7/8-1/4
=7/8-2/8
=5/8

3/7与5/21的和的14倍是多少
(3/7+5/21)×14
=3/7×14+5/21×14
=6+10/3
=28/3

3/7与21/5的14倍的
(3/7+5/21)×14
=3/7×14+5/21×14
=6+10/3
=28/3