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Maths Exercices
Subtraction of signed numbers

To subtract signed numbers:

1. Change the sign of the second number.
2. Use the rule for adding.

(-9) - (+5) = (-9) + (-5) = -9 -5 = -14
(+12) - (-8) = (+12) + (+8) = 12 +8 = 20
(-19) - (+7) - (-6) = (-19) + (-7) + (+6) = -19 -7 +6 = -26 +6 = -20

Calculate:
(+5)-(-2)-(+9)-(+10) =