Question

16. Evaluate

(a)15+(-8) (b) -16+9 (c) -7+(23) (d) -48+(-33)​

Answer 1

Answer:

a=15-8=7

B=-16+9= -7

c=-7+23=16

D= -48-33= -81

Answer 2

Answer:

Step-by-step explanation:

You can remember this to make addition and subtraction of integers easier- "Same signs add, different signs subtract".

a) 15+(-8)

= 15-8

= 7

Explanation:15 is positive and 8 is negative, 15 and -8 have different signs, so you have to subtract them.

And then keep the sign of the bigger number. The bigger number is 15 and it has a positive sign.

b) -16+9

= -7

Explanation:-16 is negative and 9 is positive, -16 and 9 have different signs, so you have to subtract them.

And then keep the sign of the bigger number. The bigger number is 16 and it has a negative sign.

c) -7+23

= 16

Explanation:-7 is negative and 23 is positive, -7 and 23 have different signs, so you have to subtract them.

And then keep the sign of the bigger number. The bigger number is 23 and it has a positive sign.

d) -48+(-33)

= -81

Explanation:-48 and -33 is negative, -48 and -33 have same signs, so you have to add them.

And then keep the sign of the bigger number. The bigger number is -48 and it has a negative sign.

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