The question asks for equivalent expressions for 42+18. This sum equals to 60, so any expression that also equals 60 would work. Here are four examples:
30 + 30
40 + 20
50 + 10
100 - 40
In each of these examples, the result of the operation is 60, making them equivalent to 42+18.
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Four equivalent expressions for 42 + 18 , which equals 60, are 30 + 30 , 40 + 20 , 50 + 10 , and 100 − 40 . Each of these expressions results in the value 60, proving their equivalence. The key is to create combinations that still total 60.
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