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To subtract any number, change the sign of the number being subtracted; then add instead, following the rule, in this case, for addition of like signs.
=
signchanged
↓
2
+
( + 3)
= 5
↑
addinstead
1 + ( − 3) = − 2
To add numbers of unlike sign, find the difference of the absolute values, attach the sign of the number with the larger absolute value.
− 16 + 2
Use rule for adding numbers of unlike sign, as given above.
= ( − 16) + ( + 2) = − 14
− 11 + ( − 1) = − 12
To add numbers of like sign, add the absolute values and attach the common sign.
These are all correct. Return to Page 93 and try again.
