Posted by jp on Wednesday, November 14, 2012 at 6:47pm.
How do you find 81  16 using mental math?

subtraction (math)  Ms. Sue, Wednesday, November 14, 2012 at 6:54pm
I'd round the numbers to 80  15

subtraction (math)  Delilah, Thursday, November 15, 2012 at 6:55pm
Just do the problem in your head, don't use any outside sources like a calculator or a paper/pencil. I would also do like Ms. Sue said  round 81 to 80 and 16 to 15.

subtraction (math)  Tatiana, Tuesday, September 1, 2015 at 6:20pm
Your butt plus my bütt ID thesse nuts

Al_hade  Heba, Tuesday, October 18, 2016 at 8:30pm
Explain it tell how to find 8116 using mental maht
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