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Earn +20 ptsQ: What condition must be met before you can add or subtract?
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When adding and subtracting decimals you must?
add them or subtract them, as appropriate!
Why do fractions need to have a common denominator before add or subtract them?
because it would be diffcult to understand.[you don't add or subtract the demonters]
What must a fraction have before we add before we can add them?
They must have the same denominators.
What is the opposite for add?
The opposite of add is subtract.
Do you always have to have like numerators in fractions before you can add or subtract?
No, the denominators have to be the same.
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