i don't understand happy numbers. Why is 25, 50, 75 and 100 extremely happy numbers for adding and subtracting? =\.................. is it the same as estimating??

25, 50, 75 and 100 are extremely happy numbers because they're very easy to subtract or add. You just have to think about money. It is kind of the same as estimating but using happy numbers are easier.

25, 50, 75 & 100 are extremely happy numbers because they are the easier way to solve a problem or an equation...you dont even need a calculator...it is like mental math...you do it in your head. Extremely happy numbers are like estimating, you may have to round down or round up... THAT'S HOW EXTREMELY HAPPY NUMBERS WORK!

## 5 Comments:

25, 50, 75 and 100 are extremely happy numbers because they're very easy to subtract or add. You just have to think about money. It is kind of the same as estimating but using happy numbers are easier.

thanks thyrza =P ...(ate!!)

25, 50, 75 & 100 are extremely happy numbers because they are the easier way to solve a problem or an equation...you dont even need a calculator...it is like mental math...you do it in your head. Extremely happy numbers are like estimating, you may have to round down or round up...

THAT'S HOW EXTREMELY HAPPY NUMBERS WORK!

THANKS MS. NAVARRO!!! =P

there extremely happy numbers because you can think of them as quarters, easy to add and subtact.

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