Question

Bài 1: Thực hiện tính:
1) 2763 + 152 2) (– 7) + (– 14) 3) (– 35) + (– 9) 4) (–5) + (–248) 5) (–23) + 105
6) 78 + (–123) 7) 23 + (-13) 8) (– 23) + 13 9) 26 + (– 6) 10) (–75) + 50
11) 80 + (–220) 12) (–23) + (–13) 13) (– 26) + (– 6) 14) (– 75) + (–50)
15)–18 + (–12) 16) 17 + –33 17) (– 20) +-88
18) –3 + 5 19)–37 + 15 20)–37 + (–15)
21) (––32) + 5

Answer 1

Cho mik xin lại đề bài mik nhìn ki hiểu j hết

Answer 2

1)2763 + 152 = 2915

2)(-7) + (-14) = -21

3)(-35) + (-9) = -44

 

Answer 3

4; (-5) + (-248)

= - (5 + 248)

= - 253

5; (-23) + 105

= -23 + 105

= 82;

6; 78 + (-123)

= 78 - 123

= -(123 - 78)

= - 45

7; 23 + (-13)

= 23 - 13

= 10

Answer 4

8) (-23) + 13 = -10 

9) 26 + (-6) = 20 

10)   (-75) + 50 = -25 

 

Answer 5

11; 80 + (220) 

= 80 - 220

= -(220 - 80)

= - 140

12; (-23) + (-13) 

= - (23 + 13)

= - 36

13; (-26) +(-6) 

= - (26 + 6)

= - 32

14; (-75) + (-50)

= - (75 + 50)

= - 125