Estimation
Round, then add:
473 + 465
500 + 500 = 1,000
Add:
572 + 941
1,513
Subtract:
676 - 521
155
Subtract:
4,508 - 2,613
1,895
Solve:
Luz had collected a total of 393 tokens from the games at Funland. To win a large stuffed animal, 500 tokens were needed. How many more tokens does Luz need to win the large stuffed animal?
107 more tokens
Round, then add:
4,094 + 246
4,000 + 200 = 4,200
Add:
215 + 8,823
9,038
Subtract:
283 - 169
114
Subtract:
700 - 255
445
Solve:
Molly bought 150 sheets of paper. She put 50 sheets in her science folder, 25 sheets in her social studies folder, and 40 sheets in her reading folder. How many sheets did Molly have left?
10 sheets
Round, then subtract:
586 - 483
600 - 500 = 100
Add:
14,296 + 444
14,740
Subtract:
415 - 323
92
Subtract:
1,089 - 961
128
Solve:
A census says that there were 659,000 French Creole speakers in the United States. There were 186,000 more Arabic speakers than French Creole speakers. How many Arabic speakers were there?
845,000 Arabic speakers
Round, then subtract:
1,440 - 933
1,000 - 900 = 100
Add:
2,417 + 3,573
5,990
Subtract:
601 - 482
119
Subtract:
18,005 - 6,291
11,714
Solve:
In a week, a farmer collected 3,978 red apples and 2,504 green apples. He sold a total of 4,856 apples. He took the rest of the apples to the Farmer's Market. How many apples did the farmer have left for the Farmer's Market?
1,626 apples
Round, then subtract:
8,352 - 3,421
8,000 - 3,000 = 5,000
Add:
32,834 + 17,384
50,218
Subtract:
4,978 - 2,766
2,212
Subtract:
16,000 - 2,938
13,062
Solve:
Justine and her father are going on a fishing trip. The prices for supplies are as follows:
Bait: $3 per pound
Hooks: $0.50 each
Bottled Water: $1 each
Box Lunch: $6 each
Justine and her father have $25. They bought 4 bottles of water and 2 lunch boxes. How many pounds of bait can they buy?
3 pounds