Multiply by 10, 100, 1,000
60 X 20
What is 1,200
Find the product 13 X 42
WHAT IS 546.
48 X 38
What is 1,824
Ace Manufacturing ordered 17 boxes with 85 ball bearings each. They also ordered 15 boxes with 90 springs each. How many more ball bearings than springs did they order?
What is 95
10 X 90
What is 900
Find the product 15 X 24
WHAT IS 360?
For the school play, 40 rows of chair are set up. There are 22 chairs in each row. How many chairs are there in all?
What is 880
Estimate the product of 78 X 21
What is 1,600
Each student in Ms. Sike's kindergarten class has a box of crayons. Each box has 36 crayons. If there are 18 students in Ms. Sike's class, how many crayons are there in all?
WHAT IS 648 Crayons?
91 X 19
What is 1,729
Becca rode her bike 16 miles each day for 30 days. Mike rode his bike 25 miles for 28 days. Who rode farther? How much Farther?
What is Mike rode 220 miles farther.
At West School, there are 300 classrooms. Each classroom has 20 students. How many students are at West School?
What is 6,000?
A half-dollar has a diameter of about 31 millimeters. About how many millimeters long would a row of 56 half-dollars be?
What is about 1,800 millimeters
Solve using area model: 16 X 19
The partial products are 100, 40, 60, and 24. The product is 304.
36 X 12
What is 432
Carol is the treasurer of her bird-watching club. The club wants to order shirts for each of the 18 members. If each shirt costs $21, what is the cost for the members' shirts?
What is $378
Kenny bought 40 packs of baseball cards. There are 100 cards in each pack. How many cards did Kenny buy?
What is 4,000 Cards?
How could you estimate the product 253 X 93? (Explain and find the estimated product)
I would round 253 to the nearest hundred and round 93 to the nearest ten. 300 X 90 = 27,000
Solve 23 X 25
WHAT IS 575?
Each of 5 bird-watchers reported seeing 15 roseate spoonbills in a day. If they each reported seeing the same number of roseate spoonbills over 14 days, how many would be reported?
What is 1,050 Roseate Spoonbills