Math

multiply

100

10x10

What is 100?

200

20x2

What is 40?

300

4x5

What is 20?

400

5x5

What is 25?

500

12x12

What is 144?

invertebrates

100

An organism without a backbone

What is a invertebrate?

200

This invertebrate has 6legs, 3 body segments, and antennes.

What is a insect?

300

These invertebrate have 8 legs, 2 body segments.

What is a arachnid?

400

These anthropoids live in the water.

What are crustaceans?

500

This invertebrate may live in a pineapple under the sea.

What is a sponge?

subtract

100

200-100

What is 100?

200

300-100

What is 200?

300

400-200

What is 200

400

500-200

What is 300?

500

1,000-500

What is 500?

add

100

50+50

What is 100?

200

50+150

What is 200?

300

200+100

What is 300?

400

300+100

What is 400?

500

500+500

What is 1,000?

key terms

100

number plus number

What is addition?

200

the process of rearranging numbers in place value to make addition and subtraction easier

What is regrouping?

300

number minus a number

What is subtraction?

400

number times a number

What is multiplacation?

500

these symbols mean + and x

What is addition and muliplication?