Addition
Subtraction
Round by 10s
Round by 100s
Word Problems
100

124+326

(nearest 10)

120+330=450

100

67 - 12

(nearest 10)

70-10=60

100

19

20

100

590

600

100

Yazmine bought a costume that cost $27 and a bag of candy that cost $12. About how much did did she spend?

$30+$10=$40

200

567+432

(nearest 10)

570+430=1,000

200

102 - 61

(nearest 10)

100-60=40

200

42

40

200

423

400

200

Declan went to the store and got some new toys! He bought a lego set for $38 and a basketball for $16. About how much money did he spend?

$40+$20=$60

300

625+155

(nearest 10)

630+160=790

300

141- 67

(nearest 10)

140-70=70

300

113

110

300

4,638

4,600

300

Ahmed had a bowl with 546 M&Ms in it. He and his friends ate 295 of them. About how many M&Ms were left in the bowl? (to the nearest ten)

550-300=250 M&Ms

400

2,195 + 842

(nearest 100)

2,200+800=3,000

400

5,555 - 4,321

(nearest 100)

5,600-4,300=1,300

400

345

350

400

8,545

8,500

400

The school library has 2,365 books. The librarian buys 435 more books for the library. About how many books does the library now have? (to the nearest 100)

2,400+400=2,800 books

500

5,892 + 6,561

(nearest 100)

5,900+6,600=12,500
500

9,858 - 1,467

(nearest 100)

9,900-1,500=8,400

500

4,695

4,700

500

19,955

20,000

500

The third grade teachers bought 4 bags of candy. There are 353 pieces in a bag. About how many pieces are there? (to the nearest 100)

400x4=1,600 pieces

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