1) 9+(-1 1/2) 2) 8+(-2 5/7) 3) 5+ ( -6 2/3) 4) -4 2/5 +3,4 5) -9,75+2 3/4 6) -6,5+ 3 1/2 7) 4 1/2+(-3) 8) 7 2/3 + (-9) 9) 2 4/5+

Question

3 года назад

15

1) 9+(-1 1/2) 2) 8+(-2 5/7) 3) 5+ ( -6 2/3)
4) -4 2/5 +3,4 5) -9,75+2 3/4 6) -6,5+ 3 1/2 7) 4 1/2+(-3) 8) 7 2/3 + (-9) 9) 2 4/5+(-6)

1 ответ:

Tanucha871 · Answer 1 · 2021-08-02T08:15:15+03:00

9+( -1 1/2)=9 - 1 1/2=8 2/2 - 1 1/2=7 1/2

8+( -2 5/7)=8 - 2 5/7=7 7/7 - 2 5/7=5 2/7

5+( - 6 2/3)=5 - 6 2/3= - (6 2/3 - 5)= - 1 2/3

- 4 2/5+3.4= - 4.4+3.4= - 1

- 9.75+2 3/4= - 9.75+2.75= - 7

- 6.5+3 1/2= - 6.5+3.5= - 3

4 1/2+( -3)=4.5 - 3=1.5

7 2/3+(-9)= - 9+7 2/3= - 8 3/3+7 2/3= - 1 1/3

2 4/5+( -6)=2.8 - 6= - 3.2