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Vocabulary

100

This is a way to describe a number that has an uneven number of objects if you split the number into two group. It's the opposite of even.

Odd

200

This is the answer to a subtraction problem or the space between two numbers. 

Difference

300

If somebody asks you to take your best guess at how many marbles are in a jar or how tall is a tree, they are asking you to do what?

Estimate

400

This word means doing math quickly and accurately. An example would be turning 89 + 54 into 90 + 53.

Efficient

500

What is the official name of the first number in a subtraction problem? For example: 52 - 26 = 26. What is the name of the 52?

Minuend

Word Problems

100

At the zoo, there were 42 lions in their cages. There are 9 more hippos than lions. How many hippos are at the zoo?

51 hippos.

200

James had some pencils. He bought a new pack with 25 pencils. Now he has 89 pencils. How many did he have at the beginning?

64 pencils.

300

At the zoo, there were 42 monkeys in their cages. There are 9 more monkeys than bears. How many bears are at the zoo?

33 bears.

400

There were 30 people at the play theater. 8 people left because they thought it was boring. 7 people left to go to the bathroom after that. How many people are still in the theater?

15 people

500

There are some people at a baseball watching party. There were 7 Cubs fans but 13 more Nats fans than Cubs fans. How many total fans were there?

27 fans.

Geometry

100

3 sides 3 angles

Triangle

200

4 sides 4 corners

quadrilateral

300

5 sides 5 angles

pentagon

400

A hexagon has how many sides?

6

500

What is the name we use for any shape with only straight lines, no curves?

Polygon

Subtraction

100

83 - 67 = 

16

200

185 - 69 = 

116.

300

113- 85 = 

28

400

513 - 385

128

500

600 - 358

242

Place Value

100

3 hundreds 8 tens 7 ones

387

200

9 ones  5 hundreds 8 tens

589

300

6 hundred 3 ones

603

400

2 hundreds 12 tens 9 ones

329

500

1 hundred 22 tens 13 ones

333