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Vocabulary
Properties
Rounding and Estimating
2 Digit Sums
3 Digit Sums
100
What are the numbers that are added together in an addition sentence called? ex. 4 + 5 = 9 What are 4 and 5?
addends
100
Which property is shown below? 5 + 6 = 6 + 5
Commutative Property
100
Round 15 to the nearest 10. Explain how you did this.
20 because the 5 in the ones place tells me I have to round up. 15 is between 10 and 20, so I know that the nearest 10 is 20.
100
Find the sum. 45 + 27 = ______
72
100
Find the sum. 159 + 740 = _____
899
200
What is the answer in an addition sentence called? Example: 4 + 5 = 9 What is 9 in the number sentence?
sum
200
Which property is shown below? (7+3) +6 = 7 + (3+6)
Associative Property
200
Round 452 to the nearest 10. Explain how you did it.
450 because I ignored the hundreds place and looked at 52. I know that the 2 in the ones place tells me to round down. 52 is between 50 and 60, so if it rounds down, it will round to 50. Since I didn't change the hundreds, I just pop it back on and get 450.
200
Andrea has 37 Skittles. Alyssa has 29 Skittles do they have altogether?
They have 66 Skittles.
200
At the zoo, the female black bear weighs 189 pounds. The male black bear weighs 272 pounds. How much do the 2 bears weigh altogether?
They weigh 461 pounds.
300
Which property says that I can add the same numbers in any order and my answer will be the same? Example: 12 +7 = 7+12
Commutative Property
300
What property is shown below? 45 + 0 = 45
Identity Property
300
Round 875 and 927 to the nearest hundred. Do they round to the same number? How is this possible?
875 rounds to 900 and 927 rounds to 900, too. They round to the same number. This is possible because the 7 tens in 875 tell me that 875 is closer to 900 than it is to 800. The 2 tens in 927 tells me that 927 is closer to 900 than it is to 1,000. So, they both round to 900 to the nearest hundred.
300
Kevin and Joe drove 22 miles yesterday. They drove 32 miles today. How many miles have they drive altogether?
They have driven 54 miles.
300
The carts on the Ferris Wheel at a carnival can hold up to 400 pounds. If Ray weighs 170 pounds and Jim weighs 210 pounds, can they fit on the same cart?
Yes, because 170 + 210 = 380 pounds and since that is less than 400, they can go in one cart.
400
Which property says I can group the same numbers in any way and the sum will be the same? Example: 4+(5+6) = (4+5) +6
Associative Property
400
Fill in the blank. Tell which property is being used. 4 + ___ = 6 + 4
6 is the missing number. You use the commutative property.
400
Estimate the sum by rounding to the nearest 10. 56 + 12 = _______
70 because 56 rounds to 60 and 12 rounds to 10. 60 +10 = 70
400
Estimate. Then, find the sum. 83 + 11 = _______
Estimate: 80 + 10 = 90 Exact: 83 + 11 = 94
400
Estimate to the nearest hundred. Then find the exact sum. 556 + 121 = ______
Estimate: 600 + 100 = 700 Exact: 556 + 121 = 677
500
Which property says that if I add zero to a number, the sum will be that number? Example: 5 +0 = 5
Identity Property
500
Fill in the blank and tell what property you used. 5 + ____ = 5 + (6+1)
7 is in the blank. You use the associative property. You get 7 for the blank because 6 +1 = 7.
500
Estimate the sum. Round to the nearest hundred. 89 + 222 = _______
300 because 89 rounds to 100 and 222 rounds to 200. 100 + 200 = 300
500
Estimate. Then, find the sum. 54 + 67 = _____
Estimate: 50 + 70 = 120 Exact: 54 + 67 = 121
500
Estimate to the nearest 10. Then find the sum. 347 + 811 = ______
Estimate: 350 + 810 = 1,160 Exact: 347 + 811 = 1,158