Mental Math Addition

Intro

Mental math is a valuable tool that can save you time during a test. With some simple tricks and practice, this is a skill you can acquire.

Sample Problem

Add 234+366 using mental math.

624


500


793


600


592


Solution

1. Separate the two values into their expanded form:
200+30+4+300+60+6=?
2. Group them by place value:
200+300+30+60+4+6=?
3. Add the numbers that belong in the same place value:
200+300+30+60+4+6
=500+90+10
4. Add the resulting numbers together:
500+90+10
=590+10
=600
***NOTE: THIS IS ALL DONE MENTALLY AND WHEN TACKLING ANY PROBLEM WITH THIS METHOD IT SHOULD ALSO BE DONE MENTALLY***



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