Estimation
Estimate: 403 + 297
400 + 300 = 700
152 + 200
352
985 - 462
523
15 + 10 = 30 - ?
15 + 10 = 30 - 5
The school library had 342 books about animals. Over the summer, they bought 127 new books. How many animal books does the library have now?
469
Estimate: 852 - 348
850 - 300 = 550
900 - 300 = 600
525 + 350
875
754 - 328
426
8 + 4 = 3 x ?
8 + 4 = 3 x 4
The 3rd grade baked 600 cookies for the bake sale. By the end of the day, they had sold 438 cookies. How many cookies were left?
162
Estimate: 198 + 195
200 + 200 = 400
678 + 154
832
623 - 285
338
125 + 50 = 100 + ?
125 + 50 = 100 + 75
Maggie has 8 boxes. She will put 5 books in each box. How many books will there be altogether in the boxes ?
40
Estimate: 721 - 489
700 - 500 = 200
720 - 490 = 230
495 + 387
882
503 - 274
229
5 x 6 = 10 x ?
5 x 6 = 10 x 3
A toy store had 503 LEGO sets on the shelf. They sold 275 sets during a big sale. How many LEGO sets are still on the shelf?
228
Estimate: 674 + 221
670 + 220 = 890
700 + 200 = 900
972 + 798
1,770
900 - 437
463
12 + 8 = ? /5
12 + 8 = 100 / 5
Leo won 245 tickets on Friday and 355 tickets on Saturday. He spent 400 tickets on a giant stuffed panda. How many tickets does he have left?
200 tickets