# Calculate: 25551

Calculate:

a) 17 + (-23) - (-42) =

b) - 32 - (+12) + (+13) =

c) 6.7 - (+ 2.5) - (- 8.2) =

d) - 0.56 - 4.38 + 6.78 =

a) 17 + (-23) - (-42) =

b) - 32 - (+12) + (+13) =

c) 6.7 - (+ 2.5) - (- 8.2) =

d) - 0.56 - 4.38 + 6.78 =

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