Answer:

1) ans : 16

2)ans : -98

3) ans : 36

Step-by-step explanation:

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Answer:

1)16

2) -86

3) 36

Step-by-step explanation:

1) 12+(-3)+5-(-2)

=12-3+5+2

=9+7

=16 (ans)

2) -15-(-2)-71-8+6

= -15+2-71-8+6

= -13-79+6

= -92+6

= -86(ans)

3) 39-35+7-(-4)+21

=4+7+4+21

=4+11+21

=15+21

=36 (ans)

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