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3 years ago

15

When is 9+10 really equal to 21

2 answers:

schepotkina [342]3 years ago

4 0

Answer:

9 + 10 = 21

Step-by-step explanation:

9 + 10 = 21

Factor out 9 and 10

9 = 3 · 3 10 = 2 · 5

Next multiply 3 by 2

3 × 2 = 6

Then multiply 3 by 5

3 · 5 = 15

Finally add the products

15 + 6 = 21

Aleksandr [31]3 years ago

4 0

It can never be equal to 21 because that’s not how math works

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