Question

(4/3+7/3-2/1）÷28/1 7/4×21/2+7/4÷19/21 9/5+15/4÷9/4+5/2

16/3×2/1+25%×0.625+4/1

3.5÷4+360×25%+0.25×36.5

（3/2-4/1）÷4/25

能简算的要简算

Answer 1

(4/3+7/3-2/1）÷28/1
=（4/3+7/3-2/1）×28
=4/3×28+7/3×28-2/1×28
=21+12-14
=19

7/4×21/2+7/4÷19/21
=7/4×21/2+7/4×21/19
=7/4×（21/2+21/19）
=7/4×1
=7/4

9/5+15/4÷9/4+5/2
=9/5+15/4×4/9+5/2
=9/5+5/3+5/2
=9/5+（5/3+5/2）
=9/5+1
=1又9/5

16/3×2/1+25%×0.625+4/1
=16/3×2/1+4/1×8/5+4/1
=32/3+31/5+4/1
=4/1+4/1
=2/1

3.5÷4+360×25%+0.25×36.5
=3.5×0.25+360×0.25+0.25×36.5
=（3.5+360+36.5）×0.25
=400×0.25
=100

（3/2-4/1）÷4/25
=（3/2-4/1）×25/4
=12/5×25/4
=15/1

Answer 2

6去7进3退4共多少？