Use properties of addition and subtraction to evaluate the expression. -19 - 53 - 31 Enter your answer in the box.
2 answers:
You may combine these 3 numbers in any order.
-19 -53 = -72, and then
-72 - 31 = -103.
You could combine -53 and -31 first, and then combine the result with -19.
-19 - 53 - 31
= -(19 + 53 + 31)
= -(19 +31 + 53)
= -((20-1) + (30+1) +53)
= -(20 +30 +53)
= -(50 +53)
= -103
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