What is the sum of one and two thirds of the thirty-nine and two thirteenth of the thirty-nine?

What is the sum of one and two thirds of the thirty-nine and two thirteenth of the thirty-nine?

One and two-thirds is five-thirds
The sum of 5 / 3 and 2 / 13 was 71 / 39
This number multiplied by 39 is 71

1. 3 / 4 = 20 points only () () 2 / 64 / 20 = 16 / 39 / 27 = 13 / 2 / 1=
What's the percentage

1. 3 / 4 = 20 (15) 6 / 20 = (10) 3 / 64 20 = 16 (5) 27 / 39 = 13 (9) 1 / 2 = 2 / 4 = 3 / 6 = 4 / 8

(- 13) × 2 / 3-0.34 × 2 / 7 + (- 13) × 1 / 3-5 / 7 × 0.34 =?
Come on,
Simple operation!
We should give some ideas to solve the problem

(- 13) × 2 / 3-0.34 × 2 / 7 + (- 13) × 1 / 3-5 / 7 × 0.34
=(- 13) × 2 / 3 + (- 13) × 1 / 3 - (0.34 × 2 / 7 + 5 / 7 × 0.34)
=(- 13) × (2 / 3 + 1 / 3) - 0.34 * (2 / 7 + 5 / 7)
=-13*1-0.34*1
=-13.34

Calculation by simple method: - 13X 2 / 3-0.34x 2 / 7 + 1 / 3 x (- 13) - 5 / 7 x 0.34

Original formula = - 13 * 2 / 3 + (- 13 * 1 / 3) - 0.34 * 2 / 7-0.34 * 5 / 7
= -13*（2/3+1/3）-0.34*（2/7+5/7）
= -13-0.34=-13.34

- 13 × 2 / 3 - 0.34 × 2 / 7 + 1 / 3 × (- 13) - 5 / 7 × 0.34
emergency

=- 13 × 2 / 3 + 1 / 3 × (- 13) - 5 / 7 × 0.34-0.34 × 2 / 7 = - 13 x (2 / 3 + 1 / 3) - (5 / 7 + 2 / 7) x 0.34) = - 13 - 0.34 = - 13.34, benefactor, I see that you are a unique talent in Wulin with delicate bones, magnificent demeanor and wisdom

Simple calculation of 5 / 9 times - 2.7
Such as the title
(-8)÷(-1.25)

5/9*-2.7=-5*2.7/9
Multiply the score by 10
-5*27/9/10=-5*3/10=-3/2=-1.5

10×10－9×9＋8×8－7×7＋…… How to do simple calculation of + 1 × 1

Original formula = 19 + 15 + 11 + 7 + 3
=55

(1 / 5 + 1 / 6) - (1 / 6-1 / 7) - (1 / 7-1 / 8) - (1 / 8-1 / 9) - (1 / 9-1 / 10),

=1/5+1/6-1/6+1/7-1/7+1/8-1/8+1/9-1/9+1/10
=1/5+1/10
=3/10

Simple operation of 5 times 8 × 98
899 + 344 simple operation 1248 ／ 24 simple operation

5×8×98
=40×98
=40×(100-2)
=40×100-40×2
=4000-80
=3920
899＋344
=(900-1)+344
=(900+343)+(1-1)
=1243

1 + 2-3 + 4-5 + 6-7 + 8-9. + 1000
To add regularity, urgent!

Group sum
1-499*1+1000=502