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.
* 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
If you multiply an odd number by an even number, the product (answer) will be even. Example: 5 x 4 = 20
13
158
If half of the number is 20, then the number must be 2 * 20 = 40. Therefore three quarters of the number would be 3 * (40/4) = 30.
Multiply the number by 0.2
well in order to find a percent of something you must convert it into a decimal and then multiply it by the number 20%=.20 .20 times 11=2.20 so 20% of 20 is 2.2
11 over 20 is larger. a half is 1 over 2, as long as you multiply or divide by the same number top and bottom you can re-write fractions. So if you multiply the half by ten top and bottom you get 10 over 20 so it's obvious that 11 is greater than 10. Also since 11 is more than half of 20 it's pretty easy in that case.
if you want the whole number, multiply 20 by 7. 20+20+20+20+20+20+20=140
Two methods can be used here; take your pick. 1) Multiply 2 times the number, multiply 1/2 times the number, add the results. Example: 2 1/2 times 20 = (2 x 20) + (1/2 x 20) = 40 + 10 = 50. 2) Convert the mixed fraction into an improper fraction, than multiply. Example: 2 1/2 x 20 = 5/2 x 20 = 100/2 = 50.
Multiply by 20 and divide by 100 or alternatively, just multiply by 0.20. Example: 20% of 400 is 80.
If you multiply a number by 0.8, the result is 20% less than the original number.
Well, a square number is the answer to a number multiplied by itself. So, what you'd have to do is multiply 20*20, and the answer is 400.
Multiply the number by 0.2
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.
50 = 0.1 x multiply both sides by 10 to get 1 x (or 100% of x) 500 = x therefore, 50 is 10% of 500