Question

Add -7mn +5, 12 mn+2, 9mn -8,- 2mn-3​

Answer 1

4mn - 6

Explanation:

expressions => (-7mn) + 5, 9mn - 8, -2mn - 3

In addition, we get..... (-7mn + 9mn - 2mn) + (-3 - 8 + 5)

4mn + (-6)

=> 4mn - 6

Hope it helps.

Answer 2

7+5+12+2+9+2+3=40mn