4. Add
a) 3mn. -5 mn, 8mn , -4 mn
b) -7mn+5, 12 mn+2,9 mn-8, -2 mn -3
c) 4x’y, -3xy?, -5xy?, 5xy
Answers
Answered by
1
Answer:
I don't know
Step-by-step explanation:
but I hope you can do it
Answered by
0
Step-by-step explanation:
a) 3mn - 5mn , 8mn ,-4mn
= 3mn - 5mn + 8mn - 4mn
= - 2mn + 4mn
= 2mn
b) - 7mn + 5 ,12mn + 2 , 9mn- 8 , -2mn - 3
= -7mn + 12mn + 9mn - 2mn + 5 + 2 - 8 - 3
= 5mn + 7mn + 7 - 11
= 12mn - 4
c) 4xy , -3xy , - 5xy ,5xy
= 4xy - 3xy - 5xy + 5xy
= xy
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