Question

四道简便计算

4.5除以1/4+96*4.5

13-8/9*3/8除以1/24

3/8*（2/5+2/15）除以3/4

5/7除以[（5/6-4/5）*10]

如上 求解

Answer 1

4.5除以1/4+96*4.5
=4.5×4+96×4.5
=4.5×（4+96）
=4.5×100=450

13-8/9*3/8除以1/24
=13-8/9×（3/8×24）
=13-8/9×9
=13-8
=5

3/8*（2/5+2/15）除以3/4
=3/8×4/3×（2/5+2/15）
=1/2×（6/15+2/15）
=1/2×8/15
=4/15

5/7除以[（5/6-4/5）*10]
=5/7÷10÷（5/6-4/5）
=5/70÷（25/30-24/30）
=5/70÷1/30
=5/70×30
=15/7

Answer 2

4.5÷1/4+96×4.5
=4.5×4+96×4.5
=4.5×（4+96）
=450

13—8/9×3/8÷1/24
=13—8/9×3/8×24
=13—8
=5

3/8×（2/5+2/15）÷3/4
=3/8×（2/5+2/15）÷3/4
=3/8×8/15×4/3
=4/15

5/7÷[（5/6-4/5）×10]
=5/7÷[（5/6×10—-4/5×10]
=5/7÷1/3
=5/7×3
=15/7

Answer 3

4.5除以1/4+96*4.5
=4.5×4+96×4.5
=4.5×（4+96）
=4.5×100
=450

13-8/9*3/8除以1/24
=13-8/9×3/8×24
=13-8/9×9
=13-8
=5

3/8*（2/5+2/15）除以3/4
=3/8×4/3×2×（1/5+1/15）
=1/5+1/15
=4/15

5/7除以[（5/6-4/5）*10]
=5/7÷[5/6×10-4/5×10]
=5/7÷[25/3-8]
=5/7÷[25/3-24/3]
=5/7÷1/3
=5/7×3
=15/7

Answer 4

4.5除以1/4+96*4.5
=4.5×4+4.5×96
=4.5×(4+96)
=4.5×100
=450

13-8/9*3/8除以1/24
=13-8/9×3/8×24
=13-8
-5

3/8*（2/5+2/15）除以3/4
=3/8×4/3 ×(6/15+2/15)
=1/2×8/15
=4/15

5/7除以[（5/6-4/5）*10]
=5/7÷[(25/30-24/30)×10]
=5/7÷[1/30×10]
=5/7×3
=15/7

Answer 5

1、450
2、5
3、16/15
4、15/7