Solving Division Expressions
Solve:
4 ➗ 15
4/15
1/3 ➗ 2
1/6
What is the division expression for:
3/14
3 ➗ 14
The area of a bathroom is 15 square feet. Cara will be placing 1/5-square-foot tiles on the entire floor. How many tiles will Cara use?
75 tiles
Which expressions are equal to 1/8? Write the correct letters on your whiteboard.
A- 2 ➗ 16
B- 8 ➗ 1
C- 1/8 ➗ 1
D- 2 ➗ 1/16
E- 1 ➗ 1/8
A and C
Solve:
9 ➗ 18
1/2
7 ➗ 1/2
14
What is the division expression for
1/10
1 ➗ 10
Cheryl says that 2 3/4 equals 4 ➗ 11. Is she correct? Explain.
No she is not correct. 4 ➗ 11 equals 4/11. Cheryl reversed her numerator and denominator to 11/4, and got a mixed number of 2 3/4
Fiona and 3 friends lifted a 50 pound couch. How many pounds did each friend lift?
12 1/2 pounds
Solve:
45 ➗ 7
6 3/7
1/6 ➗ 4
1/24
What is the division expression for:
3/15
3 ➗ 15
A restaurant chef has 20 cups of chicken broth. She sets 3 cups aside, and uses the rest for a recipe that calls for 1/3 cup of chicken broth. How many meals can the chef make?
51 meals
Raegan run 1 mile in 1/6 hour. How far can she run in 3 hours? Write an equation and solve.
3 ➗ 1/6 = 18 miles
Solve:
2 ➗ 8
1/4
1/5 ➗ 6
1/30
What is the division expression for:
34/7
34 ➗ 7
Lee has a piece of string that is 1/8 yard long. He cuts it into 2 equal pieces. Write an expression for the length, in yards, of each piece of string, and solve.
1/8 ➗ 2
1/16
Look at the equations below:
3 ➗ 1/2 = 6
3 x 2 = 6
What generalization can you make about the equations?
Dividing a whole number by a unit fraction is the same as multiplying the whole number by the denominator of a unit fraction.
Solve:
12 ➗ 5
2 2/5
25 ➗ 1/6
150
What is the division expression for:
16/17
16 ➗ 17
Tamar has 30 acres of farmland. He is setting 5 acres aside for a house, and using the rest for farmland. He is dividing the rest into 1/5 acre lots. How many 1/5 acre lots will he have?
30 - 5
25 ➗ 1/5
125 lots
Theodore has a wall that is 15 square feet. He is painting 5 square feet of the wall, and is tiling the rest of wall with 1/5 square foot tiles. How many tiles will he use to tile the wall?
50 tiles