110
1/10 = 10/100. 10/100 + 1/100 = 11/100
Add a 0 onto 100, or add 2 0's onto 10. Multiply by 10 = add a 0 Multiply by 100= add 00 Multiply by 1000 = add 00 Teachers prefere not to say 'add a 0'. This is like a cheat, and does not work for decimals.
-10 and +10.
100 x 23 = 2300 (If timing by 10, simply add a zero. If by 100, add two zeroes.)
add 1 through 10 times 10 then add 10 through 90 and add the answers
100
double and add 10%
One whole.
To find the percent of anything, you change the percent to a decimal, and multiply. Finding the percent of a sum is no different. ex: 10% of (30 + 100) I can use the distributive property to take 10% of 30, then add 10% of 100. .10(30 + 100) = .10*30 + .10*100 = 3 + 10 = 13 In order to see how this works, let's not distribute. .10(30+100) and instead, add 30 +100 first, then take the percent. .10(130) = 13 We get the same answer! You can take the percent of the whole thing, or you can take the percent of the pieces that add up to the whole.
12. You can figure this out because 20% of 100= 1/5. You then take 1/5 of 10 and get 2. Finally, you add 2 to 10 and get 12.
to multiply a number by 10, all you have to do is add zeros at the end of the number. Below are examples: 10*1=10 10*10=100 10*100=1000