3-digit x 1-digit
132 x 5 =
660
1,000 x 7 =
7,000
Jill is making cookies for a school bake sale. She wants 8 plates of cookies with 22 cookies on each plate. What is a REASONABLE ESTIMATE for the number of cookies that Jill should make?
8 rounds up to 10 and 22 rounds down to 20
10 x 20 = 200 cookies
61 x 35 = ?
2,135
The art teacher has 6 packages of poster board. There are 30 pieces of poster board in each package. How many piece of poster board does the art teacher have?
6 x 30 = 180 pieces of poster board
463 x 4 =
1,852
2,341 x 3 =
7,023
The tickets for 3 performances of the school play sold out. There are 189 seats in the auditorium. ABOUT HOW MANY tickets have been sold?
189 rounds up to 200
200 seats x 3 performances = 600 tickets
36 x 25 = ?
900
Mark knows there are 24 hours in one day. How many hours would there be in 6 days?
6 x 24 = 144 hours
609 x 6 =
3,654
5,762 x 5 =
28,810
There are 14 rows of windmills with 38 windmills in each row. ESTIMATE how many windmills there are all together?
14 rounds to 10
38 rounds to 40
10 x 40 = 400 windmills
68 x 42 = ?
2,856
There are 146 musicians in a marching band. Each musician has 9 buttons on his/her uniform. How many buttons are there in all?
146 x 9 = 1,314 buttons
843 x 7 =
5,901
6,789 x 4 =
27,156
Julia worked about 18 hours last week making fruit baskets to sell as gifts. ABOUT how many minutes did she spend making fruit baskets?
*Hint = there are 60 minutes in in hour
18 rounds to 20.
60 x 20 = 1,200
Julia worked for about 1,200 minutes
98 X 14 = ?
1,372
The tree in Joey's yard is 57 feet tall. There are 12 inches in one foot. How many inches tall is the tree?
12 x 57 = 684 inches tall
999 x 9 =
8,991
9,035 x 6 =
54,210
The workers at Mrs. Piper's apple grove picked 87 dozen apples. There are 12 apples in a dozen. ABOUT how many apples did the workers pick?
87 rounds up to 90
12 rounds down to 10
90 x 10 = 900
The workers picked about 900 apples.
79 X 86 = ?
6,794
An adult dolphin eats about 27 pounds of fish each day. How many pounds of fish will an adult dolphin each in 3 weeks?
1 week = 7 days
3 weeks = 21 days
21 days x 27 lbs of fish = 567 lbs of fish