Finishing these equations will help you get multiplying multiples of ten down pat. I have them down pat and I never, never multiply these numbers the way I used to do it.
1a. 200 X 90 = 1b. 2,000 X 900 =
1c. 200 X 40 = 1d. 2,000 X 4 =
1e. 700 X 60 = 1f. 70,000 X 600 =
1g. 100,000 X 300 = 1h. 2,000 X 6,000 =
1i. 70,000 X 20,000 = 1j. 200,000 X 7,000 =
1k. 900 X 70 = 1l. 1,010 X 30 =
2. There are twelve eggs in one dozen. How many eggs are there in ten dozens?
3. What if 100 kids each had 100 pennies? How many pennies would they have altogether?
4. What if 100 kids each had two pairs of shoes. How many shoes would there be altogether? (This one is just a little tricky. Read the problem carefully!)
5. What if 60 kids had seven pencils each. How many pencils would there be altogether?
6. What if 12 kids were given 10 dollars each for a field trip? How much money would there be altogether for the trip?
7. A big pizza was divided into twelve pieces. Three kids ate two pieces each but the one grown-up in the group ate twice as many pieces as each one of the kids did.
Write the equation showing what fraction of the pizza was eaten:
Write the equation showing what fraction of the pizza was left over:
8. At Kayla’s school, 1/6 of the students walk to school, 1/6 of the students have a parent drive them to school, and the rest take the school bus. Write the equation showing what fraction of the students take the bus to school:
Write the equation showing what fraction of the students don’t take the bus to school:
9. Cleveland drew a picture of nine cats. Two of the cats were all black, three were all white, three were black and white, and one was a light shade of brown. Write an equation to show the fraction of the cats in his picture that were not all black:
10. There were 32 kids in the middle school orchestra. One-fourth of the kids played viola, one-half played violin, one-eighth played cello, and one-eighth played bass.
How many kids played bass? _____________
How many kids played viola? _____________
Did you figure out my little trick in question #3? I asked about the number of shoes, not the number of pairs of shoes.
To check your answers, go to Book 3 Answers