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Earn +20 ptsQ: What number multiply -30 and add -7?
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What two factors of 7 add up to -30?
-23
What two numbers multiply to give you -30 but add to give you 7?
-23
What is a trick for multiplying by the 12s?
First, multiply the original number by 10. Then multiply the original number by 2. Add the two answers that you got and you have just multiplied by 12. For Example: 7x12=(7x10)+(7x2) 70+14 84
What does 7 x 14 plus 1 mean?
It means you need to multiply 7 by 14 and then add 1 to the answer.It means you need to multiply 7 by 14 and then add 1 to the answer.It means you need to multiply 7 by 14 and then add 1 to the answer.It means you need to multiply 7 by 14 and then add 1 to the answer.
How can you multiply numbers by eleven mentally?
Multiply by ten and add one of the number. 7 x 11 = 70 + 7 23 x 11 = 230 + 23 = 253.
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