Number calculation exercise

Calculate:
a) 17 + (-23) - (-42) =
b) - 32 - (+12) + (+13) =
c) 6.7 - (+ 2.5) - (- 8.2) =
d) - 0.56 - 4.38 + 6.78 =

Your answer:

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You need to know the following knowledge to solve this word math problem:

arithmetic

numbers

rational numbers

Grade of the word problem

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