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Multiply by ten and add one of the number.

7 x 11 = 70 + 7

23 x 11 = 230 + 23 = 253.

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Q: How can you multiply numbers by eleven mentally?
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Related questions

What two numbers add up to make eleven and multiply together to make twenty eight?

4 and 7


What equals 11 by multiply?

There are multiple combinations of numbers that multiply to equal 11. One example is 1 and 11, as 1 multiplied by 11 equals 11. Another example is -1 and -11, as -1 multiplied by -11 also equals 11.


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11,011 is how you write eleven thousand eleven


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(-15) x 4 = -60 -15 + 4 = -11 ~Jason


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The patterns and properties to compute mentally 120 times 30 is the numbers 12 and 3 plus the two 0. Multiply 12 by 3 (36) and add the two 0 (3600).


What do you get when you multiply numbers?

When you multiply numbers, you get their product.


How do you write numbers in the eleven thousand eleven hundred eleven?

They are: 11,000+1,100+11 = 12,111


What two numbers add to make negative eleven and multiply to make 28?

List numbers that multiply to make 28 and find their sums. Since negative times a negative is positive, list the negatives. -1, -28 = -29 -2, -14 = -15 -4, -7 = -11 Aha! -4 and -7 multiply to make 28 and add to -11; therefore, -4 and -7 are the two numbers.


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