Compatible Numbers

Name:

Class:

Date:

Show your work for each problem.

1.
Which number is compatible with to make ?
1. a)83
2. b)73
3. c)63
4. d)77
2.
What number goes with to make ?
3.
Which pair of numbers are compatible for making ?
1. a) and
2. b) and
3. c) and
4. d) and
4.
What number goes with to make ?
5.
Which compatible number would you use to estimate ?
1. a)
2. b)
3. c)
4. d)
6.
Use compatible numbers to estimate . What is your estimate?
7.
Find the compatible number for to make .
8.
To estimate , which compatible number for would work best?
1. a)
2. b)
3. c)
4. d)
9.
Estimate using compatible numbers, then find how close your estimate is to the actual answer.
10.
What number goes with to make ?
11.
You want to estimate . Which compatible numbers would give the best estimate?
1. a)
2. b)
3. c)
4. d)
12.
A store sells books for 47 dollars each. Estimate the cost of 8 books using compatible numbers.
13.
Estimate using compatible numbers. What is your estimate?
14.
You have 100 dollars and want to buy items costing 28 dollars, 37 dollars, and 19 dollars. Use compatible numbers to estimate if you have enough money.
15.
Which estimation uses compatible numbers correctly for ?
1. a)
2. b)
3. c)
4. d)
16.
What number goes with to make ?
17.
A baker needs to divide 453 cookies equally among 9 classes. Estimate how many cookies each class gets.