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3 years ago

Find the difference. –12 – (–21) = _____ –33 –9 33 9

Mathematics

1 answer:

AysviL [449]3 years ago

6 0

Answer:

Step-by-step explanation:

(-)(-) = (+)

(-)(+) = (-)

(+)(-) = (-)

(+)(+) = (+)

-(-21) = (-)(-21) = (+)21 = 21

-12 - (-21) = -12 + 21 <em>use commutative property: a + b = b + a</em>

= 21 + (-12) = 21 - 12 = 9

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3 years ago

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2 years ago

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He is wrong...

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