Vocabulary
Mental Math
Estimating
Subtract Across Zeros
Anything Goes
100

What property is this an example of?

5 + 7 = 12

7 + 5 = 12

Commutative Property of Addition

100

What is 23 + 77?

100

100

Estimate to the nearest thousand.

5,323 + 2,611

5,000 + 3,000 = 8,000

100

100 - 27

73

100

What year was the Mary Rowlandson Elementary School built?

2002

200

What property is this an example of?

2 + 0 = 2

4 + 0 = 4

17 + 0 = 17

Identity Property of Addition

200

What is 145 + 55?

200

200

Estimate to the nearest hundred.

4,225 + 98 

4,200 + 100 = 4,300

200

1,000 - 328

672

200

What is the room number of our room?

205

300

What property of addition is this an example of?

(4 + 3) + 8 = 15

4 + (3 + 8) = 15

Associative Property of Addition

300

What is 372 + 58

430

300

Estimate to the nearest thousand.

24,300 + 10,125

24,000 + 10,000 = 34,000

300

6,000 - 1,773

4,227

300

What color is Mrs. Willard's car?

silver

400

What is a symbol or letter that stands for a number?

A variable

400

What is 2,320 + 1,600?

3,920

400

Estimate to the nearest thousand

95,487 - 61,628

95,000 - 62,000 = 33,000

400
76,810 - 22,645

54,165

400

Who sailed the ocean blue in 1492?

Christopher Columbus

500

What does this show?

14 + 12 = 26

26 - 12 = 14

Inverse Operations

500

What's 12,400 + 19,000

31,400

500

Estimate to the nearest thousand.

262,262 - 132,147

262,000 - 132,000 = 130,000

500

231,086 - 172,863

58,223

500

We all know that George Washington was our first president.  Who was our second?

John Adams