Question

please answer this question step by step please ​

Answer 1

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$a. \: \: - 7 - ( - 12) \\ \\ = - 7 + 12 \\ \\ = 5$

$b. \: \: 3 - ( - 7) \\ \\ = 3 + 7 \\ \\ = 10$

$c. \: \: 8 - ( - 15) \\ \\ = 8 + 15 \\ \\ = 23$

$d. \: \: 89 - ( - 11) \\ \\ = 89 + 11 \\ \\ = 100$

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Answer 2

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a) -7-(-12)

= - 7+12

=5

b)3-(-7)

=3+7

=10

c)8-(-15 )

=8+15

=23

d) 89-(-11)

=89+11

=100