Replacing a number with a number that tells about how many or how much.
What is Rounding?
100
17 + 11 = 11 + 17
What is the commutative property of addition.
100
722 + 158
What is 880?
100
2.15 + 3.74
What is 5.89?
100
Ms. Gomez's class collected pencils for the community school supplies drive. Ethan's group brought in 143 pencils and Marcelina's group added 78 more. How many pencils did the groups contribute altogether?
What is 221 pencils?
200
The result of adding numbers together.
What is a Sum?
200
56 + (12 + 3) = (56 + 3) + 12
What is the associate property of addition.
200
Estimate by rounding to the nearest 100:
368 + 137
What is 500?
200
$5.75 + $5.23 =
What is $10.98?
200
Jim earns $22, $14, and $8 on three different days. How much did he earn in all?
What is $44?
300
Adding zero does not change the number.
What is the Identity Property of Addition?
300
Compatible Number
What is a number that is easy to work with, ends in a 0, or a 5.
300
Estimate by rounding to the nearest 10:
6,324 + 3,842
What is 10,160?
300
333.222 - 122.111=
What is 211.111?
300
Anna ran 31 laps, 12 more laps than Jonah. How many laps did Jonah run?
What is 19 laps?
400
Operations that undo each other (or reverse each other)
What are Inverse Operations?
400
66 + 18 + 2
What is 86?
400
76,118 + 4,231
What is 80,349?
400
21.34 + 167.1 + 444.19
What is 632.63?
400
One pyramid measured 143.5 meters high. Another pyramid measured 65.5 meters high. What is a difference in heights?
What is 78 meters?
500
The act of exchanging a number for an equal value in a different form.
What is Regrouping?
500
101 + 17 + 99
What is 217.
500
4,334
4,948
+ 890
_________
What is 11,372?
500
345.19876
- 14.08760
____________
What is 331.11116
500
Jake finds a pair of in-line skates on the internet. He wants his mom to order them. The skates cost $56.95. In order to have the skates shipped to Jake's house, the shipping cost is $10.65. What is the total cost of the skates?