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Estimating
Rounding
Place Value Value
Doubles
Vocabulary
100
The best way to estimate; There are 85 Hot Cheetos in a bag. Jennifer ate 17 of them.
What is 90-20
100
The number 37 is closest to the nearst tens.
What is 40.
100
The place value of 2 in the number 4,231.
What is hundreds.
100
18
What is 9 doubled.
100
The operation used when you see the words "in all"
What is addition.
200
The best estimate for the difference in Skittles if Ray has 76 Skittles in his bag and John has 54 in his bag
What is 80-50
200
The number 13 is rounded to the nearest tens.
What is 10.
200
The place value of 6 in the number 106.
What is ones.
200
The double of 15.
What is 30.
200
The operation perfomed with the word "sum"
What is addition.
300
The best estimate for the number of cakes and cupcakes for the party if Ms. Tammi baked 7 cakes and 27 cupcakes.
What is 10 +30
300
Then number 83 is rounded to the closest tens.
What is 80.
300
The number of tens in the number 90,981.
What is 8.
300
The double of 12.
What is 24
300
The operation perfomed with the words "what is the difference."
What is subract.
400
The best estimate for the number of nickels and pennies if David has 36 nickels and 15 pennies.
What is 40+20
400
The number 122 is rounded to the closest tens.
What is 120
400
How many thousands in the number 56,432
What is 6,000.
400
22
What is 11 doubled
400
Describes what happens to the numbers when you add.
What is increase ro get bigger.
500
The best estimate of money left if Christian had $0.87 and spent $0.34 of it on candy.
What is 90-30
500
The number 567 is rounded to the closest hundreds.
What is 600.
500
The expanded form for 120,121.
What is 100,000+20,000+100+20+1
500
50
What is 25 doubled.
500
The answer to a subraction problem.
What is the difference.