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Earn +20 ptsQ: What number must you multiply by 2 and a half to get 20?
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When 4 is subtraced from one half of an unknown number it is equal to 6 the number is?
Simply reverse the question and you find that 4 + 6, which is 10 equals half of the unknown number. 10 x 2 = 20, which must therefore be the unknown number.
How do you multiply by 20?
* Multiply by 10 (by addind a zero to the right of the number), * then double: Example - multiply 52 by 20: 52 x 10 = 520 double 520 = 1040
What happens if you multiply odd by even?
If you multiply an odd number by an even number, the product (answer) will be even. Example: 5 x 4 = 20
If you multiply me by 2 i become a number greater than 20 and less than 40 if you multiply me by six i end in 8 if you multiply me by 4 i end in 2 what number am i?
13
What number multiply's to 138 but adds to 20?
158
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