# subtraction (math)

posted by .

How do you find 81 - 16 using mental math?

• subtraction (math) -

I'd round the numbers to 80 - 15

• subtraction (math) -

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) -

Your butt plus my bütt ID thesse nuts

Explain it tell how to find 81-16 using mental maht

• subtraction (math) -

tell how to find 81-16 using mental math

• subtraction (math) -

81-16=

• subtraction (math) -

81-16=

## Similar Questions

1. ### Math

Using the definition of subtraction to determine the subtraction equations that are related to each of the following addition equation: a.8+7=n b.14+x=25 c.r+s=t my answers are this: a. n-7=8 b.x=25-14 c.t-s=r did I do these right?
2. ### MATH 156

What models can be used to help explain the concepts of addition and subtraction of rational numbers?
3. ### math

explain how you can find the sum 25+59 using mental math
4. ### math

Find the sum using mental math 24 + 71 =
5. ### math

find the product using mental math and the distributive property for 7(15) showing the work as shown
6. ### Math

what is 8x25x23 in mental math use subtraction
7. ### math

how do i work this problem 8x25x23 using subtraction in mental math