Estimation
Adding Whole Numbers
Subtracting Whole Numbers
Exact or Estimate
Subtracting across Zeroes
100
56 + 33; tens
What is 90
100
1,328 + 4,235 = ?
What is 5,563.
100
1,052 - 252 = ?
What is 800.
100
Two teams need to reserve a bus to travel to a football game. There are 19 players on the boys bus, and 13 players on the girls bus, and 6 coaches. What is the total number of people who will need to go on the bus?
What is Exact, and 38 people need to go on the bus.
100
11,006 - 5,643 = ?
What is 5,363.
200
87 + 54 + 36; tens
What is 180.
200
48,619 + 33,357 = ?
What is 81,976.
200
6,123 - 5,665 =?
What is 458.
200
Luis has nearly finished his homework. He can't play with his friends until his home is completed. Each piece of homework will take him about 9 minutes to complete. He has to complete a math, science, and spelling piece of homework. About how long will it be before he can go out and play?
What is Estimate, and about 30 minutes till he can go out and play.
200
87,002 - 67,875 = ?
What is 19,127.
300
6,342 + 4,895; hundreds
What is 11,200
300
106,498 + 67,329 = ?
What is 173,827.
300
902,678 - 45,678 = ?
What is 857,000
300
Roger needs $32.99 to buy a board game. He checks his wallet to see if he has enough to buy the board game. About how much money does Roger need to buy the book?
What is Estimate, and Roger needs about $30.
300
70,003 - 42,106 = ?
What is 27,897.
400
43,986 - 21,189; thousands
What is 23,000
400
169 + 3,472 + 782 =
What is 4,423.
400
$105,465 - $94,752 = ?
What is $10,713.
400
The Philadelphia Eagles football team needs to know how many footballs they need for the upcoming game. There are four quarters in a football game. The Philadelphia Eagles use about 7 footballs per quarter. About how many footballs do the eagles need for the football game?
What is Estimate, and about 40 footballs.
400
960,001 - 67,893 = ?
What is 892,108.
500
$6,389 + $4,252 +$2,653; thousands
What is $13,000.
500
$45,678 + $67,894 = ?
What is $113,572.
500
56,434 bicycles - 7,324 bicycles = ?
What is 49,110 bicycles.
500
63,967 fans can fit into a soccer stadium. The stadium had about 5,475 seats empty. How many fans attended the soccer game?
What is Exact, and 58,492 fans attended the football game.
500
$90,001 - $82,867 =?
What is $7,134
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