Posted by Ashtyn on Tuesday, September 9, 2008 at 4:00pm.
What is "mental math" and give examples. 4th grade

Math  Ms. Sue, Tuesday, September 9, 2008 at 4:44pm
Mental math is doing simple math problems in your head. For instance, to estimate 49 + 53, you need to round to 50 + 50, which equals about 100.
You can use mental math to estimate the product of two numbers  19 times 21. Round to 20 * 20 = about 400.
Another form of mental math is to listen to the teacher give a math problem with several steps, and then give the answer. Example: 1/2 of 10 + 6  2 = ?

Math  undrakh, Wednesday, September 10, 2008 at 9:16am
50+50=100
20 times 20=400

Math  undrakh, Wednesday, September 10, 2008 at 10:14am
50+50=100
20*20=400

Math  Sahana, Saturday, October 11, 2008 at 12:37pm
Mental Math is practically doing math in your head. That's why the word mental meaning "mind" is in Mental Math.
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