3rd grade Expanded Form
3rd grade Mental Math
3rd grade Problem Solving
3rd grade multiplication
Rounding
100

Build a 4 digit number: 3 + 40 + 300 + 2000

2,343

100

20+50 

70

100

Moon Elementary School cafeteria sold 586 hamburgers on Monday They sold 279 hamburgers on Wednesday. What is the best estimate for the total number of hamburgers sold?

900

100

5x2

10

100

Round 47 to the nearest ten.

50

200

3 + 4000 + 20 + 600 equals?

4,623

200

56+50

106

200

Sue swims in the pool from 1:10pm to 4:10pm. For how many hours did she swim?

3 hours

200

7x2

14

200

Round 32 to the nearest ten.

30

300

900 + 90 + 1000 + 1 equals?

1,991

300

1250+1240

2,490

300

Tasha is 17, Robert is 13, Dorothy is 9, Michael is 8.  What is the total age of the people if the numbers are added together?

17+13+9+8=47

300

4x6

24

300

Round 161 to the nearest hundred

200

400

6 + 0 + 3000 + 80

3,086

400

8,000+8,000

16,000

400

James has 40 books.  He put them on 5 shelves. He put an equal number of books on each shelf. How many books were on each shelf?

8 books were on each shelf

400

9x9

81

400

Round 728 to the nearest 10.

730

500

What is the value of 0 + 3 + 800 + 8000?

8,803

500

2,400+3,200=

5,600

500

 There are 4 tables in the classroom. Each table has 4 chairs. The chair legs need tennis balls put on them so they do not scratch the floor.  How many tennis balls are needed?


4*4= 16

16 + 16 +16 +16 =64

500

6 x 6

36

500

Round 2,578 to the nearest ten

2,580