Vocabulary
What property is this an example of?
5 + 7 = 12
7 + 5 = 12
Commutative Property of Addition
What is 23 + 77?
100
Estimate to the nearest thousand.
5,323 + 2,611
5,000 + 3,000 = 8,000
100 - 27
73
What year was the Mary Rowlandson Elementary School built?
2002
What property is this an example of?
2 + 0 = 2
4 + 0 = 4
17 + 0 = 17
Identity Property of Addition
What is 145 + 55?
200
Estimate to the nearest hundred.
4,225 + 98
4,200 + 100 = 4,300
1,000 - 328
672
What is the room number of our room?
205
What property of addition is this an example of?
(4 + 3) + 8 = 15
4 + (3 + 8) = 15
Associative Property of Addition
What is 372 + 58
430
Estimate to the nearest thousand.
24,300 + 10,125
24,000 + 10,000 = 34,000
6,000 - 1,773
4,227
What color is Mrs. Willard's car?
silver
What is a symbol or letter that stands for a number?
A variable
What is 2,320 + 1,600?
3,920
Estimate to the nearest thousand
95,487 - 61,628
95,000 - 62,000 = 33,000
54,165
Who sailed the ocean blue in 1492?
Christopher Columbus
What does this show?
14 + 12 = 26
26 - 12 = 14
Inverse Operations
What's 12,400 + 19,000
31,400
Estimate to the nearest thousand.
262,262 - 132,147
262,000 - 132,000 = 130,000
231,086 - 172,863
58,223
We all know that George Washington was our first president. Who was our second?