Addition
Subtraction
Estimation
Word Problems
Rounding
100

1,416+500=

1,916

100
9,876-815=

9,061

100

Estimate.

1,520+590=

2,000+600= 2,600

100

Joey had 607 raspberries. He gave his friend Sarah 480 raspberries. How many raspberries did Joey have left?

127 Raspberries

100

68,670 rounded to the highest place value.

70,000

200

3,051+2,410=

5,461

200

12,618-567=

12,051

200

Estimate.

3,790-740=

4,000-700=3,300

200

Sarah, Berkeley, and Trevor each buy a bag of jelly beans.  Sarah’s bag has 356 jelly beans in it.  Berkeley’s bag has 810 jellybeans.  Trevor’s bag has 1,055 jellybeans. 

How many jelly beans do Sarah and Trevor have together?

1,411 Jellybeans

200

620,978 rounded to the greatest place value.

600,000

300

38,561+17,602=

56,163

300

5,623-4,580=

1,043

300

Estimate.

4,789+3,333=

5,000+3,000=8,000

300

Harry is counting his marbles.  He had 560 to start.  Then, his brother gave him 14,345 more.  His sister wanted to borrow some, and she took 167.  How many does he have left?

14,738 left

300

567,450 rounded to the greatest place value.

600,000

400

46,712+12,350=

59,062

400

16,350-10,480=

5,870

400

Estimate.

62,987+17,309=

60,000+20,000=80,000

400

Levy is counting his pencils.  He had 985 to start.  Then, his sister gave him 1,345 more.  His sister wanted to borrow some, and she took 490.  How many does he have left?

1,840 left

400

98,786 rounded to the greatest place value.

100,000

500

31,890+9,765=

41,655

500

18,890-14,796=

4,094

500

Estimate.

89,706-41,003=

90,000-40,000=50,000

500

Jeff and Joe each have a bag of marbles.  Jeff has 229 marbles.  Joe has 455 marbles.  How many more marbles does Joe have than Jeff? 

Would you use estimation or computation?

Computation

226

500

987,007 rounded to the greatest place value.

1,000,000

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