Question

脱式计算(能简算的要简算)计算过程要全and方程 有点多呵呵 O(∩_∩)O谢谢了~~~~急急急七道题

2/3+5/12-1/6 35÷(6/5÷3/7)
3/10×(5/7-10/21) 5/6×3/4+5/6×50%-5/6×25%

4+3/8X=16 5/7X-2/3=1/2 X-15%X=3.2

Answer 1

2/3+5/12-1/6
=8/12+5/12-2/12
=11/12;
35÷(6/5÷3/7)
=35×(5/6)×(3/7)
=15×(5/6)
=25/2;
3/10×(5/7-10/21)
=(3/10)×(5/7)-(3/10)×(10/21)
=3/14-1/7
=3/14-2/14
=1/14;
5/6×3/4+5/6×50%-5/6×25%
=(5/6)(3/4+0.5-0.25)
=(5/6)×1
=5/6;
4+3/8X=16
3x/8=12;
x=32;
5/7X-2/3=1/2
5x/7=3/6+4/6;
x=(7/6)×(7/5)
x=49/30;
X-15%X=3.2
0.85x=3.2;
x=320/85;
x=64/17;
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Answer 2

2/3+5/12-1/6
=13/12-1/6
=11/12

35÷(6/5÷3/7)
=35×3/7÷6/5
=15÷6/5
=12.5

3/10×(5/7-10/21)
=3/10×5/7-3/10×10/21
=3/14-1/7
=1/14

5/6×3/4+5/6×50%-5/6×25%
=5/6×（3/4+50%-25%）
=5/6×1
=5/6

4+3/8X=16
3/8X=12
X=32

5/7X-2/3=1/2
5/7X=7/6
X=49/30

X-15%X=3.2
0.85X=3.2
X=64/17

Answer 3

艹