Estimating with Whole Numbers
Estimate Adding & Subtracting Whole Numbers
Rounding Decimals
Estimating with Decimals
Adding and Subtracting with Decimals
100
Estimate the sum for: 3,516 + 2,460.
4,000 + 2,000 = 6,000 OR 3,500 + 2,500 = 6,000
100

What is the sum of 5,671 + 3,424?

9,000

100
Round 2.54 to the nearest tenths place.
2.5
100

About how much is 3.74 + 3.25?

4 + 3 = 7 OR 3.7 + 3.3 = 7.0

100

3.5 + 3.2 =

6.7

200
Estimate the difference of 4,618 - 1,388.
5,000 - 1,000 = 4,000 OR 4,600 - 1,400 = 3,200
200

Estimate  the difference to the nearest hundred: 5,473 - 2,918 =

  2,500    

200
Round 2.3781 to the nearest hundredths place.
2.38
200
Estimate the difference between 4.58 and 3.27
4.6 - 3.3 = 1.3 OR 5 - 3 = 2
200

3.5 + 4.7

8.2

300
About how much is 46,718 + 34,081?
50,000 + 30,000 = 80,000 OR 47,000 + 34,000 = 81,000
300

Estimate the difference to the nearest thousands: 56,114 - 17,308 =

39,000

300
Jackie rounds 6.5183 to 6.52 What place did she round to?
the hundredths place
300
Ryan wants to buy a pair of pants that cost $25.15, a hat that costs $12.98 and a pair of socks that cost $3.78. About how many dollars does he need to buy all three items?
$25.00 + $13.00 + $4.00 = $42.00
300
5.63 - 2.91
2.72
400
Attendance at Lincoln Financial Field for the first three Eagles games of the season was 44,670 fans at the first game, 51,622 fans at the second game, and 48,113 fans at the third game. About how many Eagles fans have attended games so far?
40,000 + 50,000 + 50,000 = 140,000 OR 45,000 + 52,000 + 48,000 = 145,000
400

Jenny collects pennies. Last year, she collected 4,464 pennies, this year she collected 3,657 pennies, and next year she hopes to collect 5,500 pennies. If she achieves her goal next year,  estimate how many pennies will she have collected all together?

13,000 pennies

400

Round this decimal to the nearest tenths, hundredths, and thousandths place: 5.4729

5.5; 5.47; 5.473

400
Miss Stickney goes to the grocery store. She spends $14.93 on fruit, $13.56 on vegetables, and $12.26 on frozen foods. She pays for these items with a $50 bill. About how much change will she get back?
About $9.00
400
Miss Gottshall is shopping for snacks. She spends $3.56 on Goldfish, $4.79 on pretzels, and $5.61 on doughnuts. How much money did she spend on snack all together?
$13.96
500
23,517 fans attended a Phillies game, and 17,682 drove home from the game. About how many fans did NOT drive home? Please estimate to the nearest hundreds place.
23,500 - 17,700 = 5,800 fans did not drive
500

Michael and Ryan have been training for a marathon together. Michael has run 1,367 miles this year, and Ryan has run 1,086 miles this year. Their goal is to run 4,000 combined miles. Estimate many more miles do they need to run to reach their goal to the nearest hundred?

1500 miles

500
Round 3.579, 3.162, and 3.546 to the nearest hundredths place, and then order them from least to greatest.
3.16, 3.55, 3.58
500
Mr. Beard is buying books. He buys two copies of Holes for $5.99 each, and he buys two copies of Frindle for $7.25 each. He pays for these books with two $20 bills. About how much change will he get back?
About $14.00
500
Miss Murphy is buying science experiment supplies. She spent $4.99 on apples, $2.35 on lemon juice, and $1.34 on paper napkins. She paid with a $10 bill. How much change will she receive.
$1.32
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