Multiply by Tens
70 x 50 =
3500
Use rounding to estimate the product.
56 x 59 =
3600
39 × 41 = ____
1599
123 x 21 = _____
2583
A principal brings 15 boxes of popcorn for a school movie day. Each box has 3 bags of popcorn. Each bag of popcorn makes 13 cups. How many cups of popcorn does the principal bring?
585 cups
80 x 90 =
7200
Use rounding to estimate the product.
19 x 91 =
1800
83 × 65 = ____
5395
367 x 18 = ____
6606
A tiger dives 12 feet underwater. An otter dives 25 times deeper than the tiger. A walrus dives 262 feet underwater. Does the otter or walrus dive deeper?
otter
60 x ___ = 2400
40
Use rounding to estimate the product.
23 x 78 =
1600
34 × 26 = ____
884
414 x 31 = ______
12834
A Cuban restaurant donated 225 meals each hour. How many meals does the restaurant donate in 12 hours?
2700 meals
20 × ____ = 1,800
90
Use rounding to estimate the product.
57 x 81 =
4800
18 x 73 = _____
1314
324 x 81 = ____
26244
A teacher has 68 students take a 25-question test. The teacher checks the answers for 9 of the tests. How many answers does the teacher have left to check?
1475 answers
It takes 10 days to film one episode of a television show. How many days will it take to film a 20-episode season?
200 days
Use rounding to estimate the product.
99 x 53 =
5000
25 x 95 = _____
2375
516 x 23 = _____
11868
A pet store receives a shipment of 5 boxes of fish food. Each box is 26 inches high and has 28 bags of fish food. Each bag has 34 ounces of fish food. How many ounces of fish food does the pet store receive in the shipment?
The pet store receives _______ ounces of fish food.
4760 ounces of fish food