12.3. - 13. - 1 how do these four numbers make up 24

12.3. - 13. - 1 how do these four numbers make up 24

12x3+[-13-(-1)]=24

How to calculate the four numbers of 3 12 - 1 - 12 = 24

(3*12)/1-12=24

3 / 8 × 8 / 8

(3/8)X8÷(3/8)x8
=3÷(3/8)x8
=8x8
=64

-15 - (- 8) + (- 11) - 12 = how much

Original formula = - 15 + 12
=-7-11-12
=-(7+11+12)
=-30

7 / 4 × 28 + [8 / 3-18 / 7] × 21
A simple algorithm for off trial

7 / 4 × 28 + [8 / 3-18 / 7] × 21
=49 + 8 × 21 of 3-18 × 21 of 7
=49+56-54
=47

5 / 28 of a number = 10 / 21. What's the number

10 / 21 △ 5 / 28 = 8 / 3. You need to study hard!

Fill in the appropriate number: how much is 2 and 5 / 7 = 7? 1 and 16 / 13 = 16? 5 and 8 / 7 = 3 and 8? 4 = 2?

2 and 7 / 5 = 17 / 5
13 out of 16 = 29 / 16
7 of 5 and 8 = 3 and 8 23
4 = 8 / 2

3 / 4 of 16 is 8 / 7 of what number?

16x3/4÷8/7=12÷8/7=21/2=10.5

Number B: 28 × 7 / 4 = 49

In 28 × 7 / 4, the denominator 4 of 28 and 7 / 4 has this multiple relation, so we need to divide them first. 28 △ 4 = 7, 28 and 4 are missing, the "7" after the reduction is multiplied by the original "7", 7 × 7 = 49, so 28

What's the number of 5 / 3 more than 4 5 / 7

5/7 ×4 + 5/3
= 20/7 + 5/3
=60/21 + 35/21
= 95/21