Question

1) 5 + 8

2) -5 + ( -8 )

3) 5 + ( - 8 )

4) - 5 + 8

5) 17 + ( -!7 )

6) ( - 15 )+ ( - 21)

7) ( - 19 ) + 0

8) l -15 l + (-7 )

9) l - 48 l + 6

10) l - 42 l + l + 18 l

 

Answer 1

1) 5 + 8=13

2) -5 + ( -8 )=-13

3) 5 + ( - 8 )=-3

4) - 5 + 8=3

5) 17 + ( -!7 )= đề sai

6) ( - 15 )+ ( - 21)=-36

7) ( - 19 ) + 0=-19

8) l -15 l + (-7 )=8

9) l - 48 l + 6=54

10) l - 42 l + l + 18 l=60

Answer 2

1. 13

2. -13

3. -3

4. 3

5. 0

6. -36

7. -19

Answer 3

1) 5 + 8

= 13

2) -5 + ( -8 )

= ( - 5 ) - ( - 8 ) 

= -13

3) 5 + ( - 8 )

= 5 - 8

= -3

4) - 5 + 8

= 3

5) 17 + ( -!7 )

= 17 - 17

= 0

6) ( - 15 )+ ( - 21)

= ( - 15 ) - ( - 21 )

= -36

7) ( - 19 ) + 0

= -19

8) l -15 l + (-7 )

= 15 + ( - 7 )

= 15 - 7

= 8

9) l - 48 l + 6

= 48 + 6

= 54

10) l - 42 l + l + 18 l

= 42 + 18

= 60

Answer 4

1) 5 + 8

= 13

2) -5 + ( -8 )

= ( - 5 ) - ( - 8 ) 

= -13

3) 5 + ( - 8 )

= 5 - 8

= -3

4) - 5 + 8

= 3

5) 17 + ( -!7 )

= 17 - 17

= 0

6) ( - 15 )+ ( - 21)

= ( - 15 ) - ( - 21 )

= -36

7) ( - 19 ) + 0

= -19

8) l -15 l + (-7 )

= 15 + ( - 7 )

= 15 - 7

= 8

9) l - 48 l + 6

= 48 + 6

= 54

10) l - 42 l + l + 18 l

= 42 + 18

= 60

Answer 5

1) 5 + 8

= 13

2) -5 + ( -8 )

= ( - 5 ) - ( - 8 ) 

= -13

3) 5 + ( - 8 )

= 5 - 8

= -3

4) - 5 + 8

= 3

5) 17 + ( -!7 )

= 17 - 17

= 0

6) ( - 15 )+ ( - 21)

= ( - 15 ) - ( - 21 )

= -36

7) ( - 19 ) + 0

= -19

8) l -15 l + (-7 )

= 15 + ( - 7 )

= 15 - 7

= 8

9) l - 48 l + 6

= 48 + 6

= 54

10) l - 42 l + l + 18 l

= 42 + 18

= 60

Answer 6

1) 5 + 8

= 13

2) -5 + ( -8 )

= ( - 5 ) - ( - 8 ) 

= -13

3) 5 + ( - 8 )

= 5 - 8

= -3

4) - 5 + 8

= 3

5) 17 + ( -!7 )

= 17 - 17

= 0

6) ( - 15 )+ ( - 21)

= ( - 15 ) - ( - 21 )

= -36

7) ( - 19 ) + 0

= -19

8) l -15 l + (-7 )

= 15 + ( - 7 )

= 15 - 7

= 8

9) l - 48 l + 6

= 48 + 6

= 54

10) l - 42 l + l + 18 l

= 42 + 18

= 60