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Vocabulary
Rounding
Estimation
Find the sum
Expressions
100
This is the answer to an addition problem?
What is the sum?
100
13.878 - the first 8 is underlined.
13.9
100
7.3 - 5.54
What is 15.50?
100
9.1 + 7.21 =
What is 16.31?
100
A student spent $4.35 on a pencil, $2.30 on erasers and $.98 on a pencil sharpener. About how much did he spend?
What is about $7
200
This is the result of subtracting one number from another.
What is the difference?
200
459.98 - the first 9 is underlined
What is 460?
200
78.9 + 34.9 =
What is 110?
200
45.08 + 7.21 =
What is 52.29?
200
An expression for the sum of 25 blocks and 17 blocks.
What is .25 + .17?
300
This states that addends can be added in any order and the sum remains the same.
What is the commutative property of addition?
300
.346 - the 3 is underlined
What is .3?
300
976.8 + 456.3 =
What is 1500?
300
15 + 5.69 =
What is 20.69?
300
An expression for the difference of 40 blocks and 4 blocks.
What is .40 - .04?
400
Adjusting one number to make a computation easier and balancing the adjustment by changing another number.
What is compensation?
400
246.784 - the 8 is underlined
What is 246.78
400
999.8 - 721 =
What is 300?
400
16.32 + 8 + 2.1 =
What is 26.42?
400
An expression for the sum of 107 blocks and 10 blocks.
What is 1.07 + .10?
500
This states that addends can be regrouped and the sum remains the same.
What is the associative property of addition?
500
867.2 - the 6 is underlined
What is 870?
500
6.7 + 2.1 + 3.4 =
What is 15?
500
The match of the expression of 5.9 + 1.67 is
What is 7.57?
500
An expression for the difference of 125 blocks and 10 blocks.
What is 1.25 - .10?