Express as a sum:
a-5
m-n
Express as a difference:
7+3
a+5
a+b
1 answer:
Answer:
Step-by-step explanation:
a-5 = -5+a
m-n = m + (-n)
7+3 = 7 - ( -3)
a+5 = a - (- 5)
a+b = a - (-b)
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