Sam grew 43 pumpkins and 28 cantaloupes. Joan grew
20 pumpkins. How many pumpkins did they grow in all?
43 + 20 =
63 pumpkins
100
Solve. Tell whether you need an exact answer or an estimate.
Martha baked 78 muffins and 65 tarts. How many pastries did she bake in all?
Exact.
78 + 65 =
143 pastries
200
Estimate.
72 + 56
70 + 60=
130
200
241 + 398 + 604 =
1,243
200
2,789 + 1,201
3,990
200
Keith picked 22 lemons and Fred picked 37 lemons. Mike picked 49 oranges. What was the total number of lemons picked?
22 + 37=
59 lemons
200
Solve. Tell whether you need an exact answer or an estimate.
Regina had $525 in her checking account. She deposited $253. About how much money is in her checking account now?
Estimate-
500 + 300 = $800
300
Estimate.
452 + 713
500 + 700=1200
300
124 + 89 + 623=
836
300
4,820 + 4,820
9,640
300
Sara had 34 pennies and 15 quarters in her bank. Her dad gave her 31 quarters and 14 dimes. How many quarters does she have now ?
15 + 31 =
46 quarters
300
Tell whether you find an exact answer or an estimate.
Alyssa owns 251 books and Benny owns 712 books.
About how many books do they have together?
Estimate.
300 + 700 = 1,000 books
400
Estimate.
828 + 163=
800 + 200=
1,000
400
345 +86 + 34=
465
400
8,345 + 1,665
10,010
400
Sam went to thirty-three soccer games this year, but missed twenty-eight. He went to thirty-two games last year. What was the total number of soccer games Sam went to?
33 + 32 =
65 soccer games
400
Tell whether you need to find an exact answer or estimate.
Benny scored 597 points on the video game and Mike scored 791 points. How many points did they score altogether?
Exact.
597 + 791 = 1,388 points
500
Estimate.
945 + 109 =
900 + 100=
1,000
500
1,650 + 254 + 370 + 5 =
2,279
500
5,682 + 6,986
12,668
500
There are thirty-four maple trees and thirty-eight walnut trees currently in the park. Park workers will plant forty-four more maple trees today. How many maple trees will the park have when the workers are finished ?
34 + 44=
78 maple trees
500
Tell whether you find the exact answer or estimate.
Jessica grew 25 watermelons and Tim grew 63 watermelons this year. About how many watermelons did they grow together?