Multiply by Powers of 10
30 x 10 =
300
23 x 4
Estimate by rounding 23 to the nearest ten
80
203 x 3 =
609
23 x 12 =
276
Lena buys 4 packs of markers. Each pack has 28 markers. How many markers does Lena buy in all?
112
400 x 600 =
240,000
38 x 6
Estimate by rounding 38 to the nearest ten
240
421 x 4 =
1,684
46 x 28 =
1,288
A movie theater has 243 seats. There are 6 identical theaters in the building. How many seats are there in total?
1,458
3,000 x 20 =
60,000
127 x 5
Estimate by rounding 127 to the nearest hundred
500
536 x 6 =
3,216
125 x 32 =
4,000
A school is ordering folders for its students. There are 36 students in each class and 25 classes in the school. How many folders does the school need to order if each student gets 1 folder?
900
30 x 105 =
3,000,000
241 x 9
Estimate by rounding 241 to the nearest hundred
1,800
782 x 7 =
5,474
217 x 45 =
9,765
A farmer harvested 127 apples from each of his 34 trees. How many apples did he harvest in all?
4,318
What is equivalent to multiplying a number by 103?
Multiplying by 1,000
693 x 27
Round both numbers to estimate the product. Explain your rounding strategy.
21,000
Round 693 to 700 and 27 to 30. 700 x 30 = 21,000.
895 x 9 =
8,055
396 x 87 =
34,452
A printing company prints 236 flyers each day. In 45 days, how many flyers will they print in total?
10,620