Estimation
Estimate 56 × 72
60 × 70 = 4,200
34 x 6
204
12 x 14
168
Sarah buys 6 packs of stickers. Each pack has 12 stickers. How many stickers does she buy?
72 stickers
Estimate 49 × 28
50 × 30 = 1,500
27 x 8
216
25 x 16
400
Mike buys 4 boxes of cookies. Each box has 9 cookies. He gives 7 cookies to friends. How many cookies does he have left?
29 cookies left
Estimate 374 × 6
400 × 6 = 2,400
58 x 7
406
46 x 38
1,748
A baker packs 134 cookies into boxes of 12. How many full boxes can she make and how many cookies remain?
11 full boxes with 2 cookies remaining
Estimate 198 × 47
200 × 50 = 10,000
129 x 4
516
15 x 15
225
A field has 63 rows of trees with 24 trees per row. After planting, 15 trees died. How many trees remain? Estimate first, then calculate exactly.
1,497 trees remain
Estimate for 347 × 89
300 x 90 = 27,000
73 x 9
657
48 x 27
1,296
A toy factory makes 47 toys per hour. They work 8 hours a day for 5 days. They ship toys in boxes of 30. How many full boxes can they ship and how many toys are left over?
62 full boxes with 20 toys leftover.