Powers of 10
36×10=
360
19 × 42 ≈
20 x 40 = 800
23×14=
322
12×5 ? 70
60 < 70
Samantha buys 24 packs of pencils. Each pack has 12 pencils. How many pencils does she have in total?
288 pencils
482×100=
48,200
47 × 68 ≈
50 x 70 = 3,500
46×32=
1,472
24×8 ? 180
192 > 180
A bookstore sells 36 books on one shelf. There are 27 shelves in the store. How many books are in the store altogether?
972 books
64×103=
64,000
128 × 91 ≈
100 x 90 = 9,000
127×45=
5,715
36×27 ? 1,000
972 < 1,000
A factory produces 125 toy cars every day. How many toy cars does the factory produce in 48 days?
6,000 toy cars
570×1,000=
570,000
3,245 × 84 ≈
3,000 x 80 = 240,000
238×76=
18,088
142×6 ? 42x13
852 > 546
A school orders 238 notebooks for each of its 76 classrooms. How many notebooks did the school order in total?
18,088 notebooks
49,000×102=
4,900,000
6,782 × 472 ≈
7,000 x 500 = 3,500,000
394×208=
81,952
215×48 ? 11,000
10,320 < 11,000
A shipping company packs 394 boxes in each container. They have 208 containers to ship. How many boxes are being shipped in total?
81,952 boxes