Least Common Denominator
Determine the LCD for the fractions 7/8 and 5/12.
LCD= 24
What would be the best estimate for the difference of 7 3/4 and 5 2/3?
a) A little more than 2
b) A little less than 2
c) Between 1 and 2
d) A little less than 1
A. A little more than 2
Sarah has 3 1/2 cups of flour. She needs 1 3/4 cups for a recipe. How much flour will she have left after making the recipe?
a) 1 1/4 cups
b) 1 3/4 cups
c) 2 1/4 cups
d) 2 3/4 cups
b) 1 3/4 cups
A cyclist drinks 2/5 of a liter of water every hour. How much water does the cyclist drink in 7 hours?
a) 2 liters
b) 3 liters
c) 4 liters
d) 5 liters
d) 5 liters
Find the LCD of the fractions 3/4 and 6/8.
LCD= 8
What would be the best estimate for the difference of 10 1/2 and 7 3/4?
a) A little less than 3
b) A little more than 3
c) Between 1 and 2
d) A little less than 1
a) a little less than 3
John ran 2 2/3 miles on Monday and 3 1/4 miles on Tuesday. How many miles did he run in total?
a) 5 5/12 miles
b) 5 7/12 miles
c) 6 1/12 miles
d) 6 5/12 miles
b) 5 7/12 miles
A chef uses 3/8 of a pound of cheese for each pizza. How much cheese is needed for 8 pizzas?
a) 2 pounds
b) 3 pounds
c) 4 pounds
d) 5 pounds
b) 3 pounds
Find the LCD of the fractions 1/2 and 3/5. Then change both fractions.
LCD= 10
1/2 changes to 5/10
3/5 changes to 6/10
What would be the best estimate for the sum of 10 1/3 and 8 1/5?
a) A little more than 18
b) A little less than 18
c) Between 17 and18
d) A little less than 17
a) A little more than 18
A recipe calls for 1 1/3 cups of sugar and 2 1/2 cups of flour. How much more flour than sugar does the recipe require?
a) 1 1/6 cups
b) 1 1/3 cups
c) 1 1/4 cups
d) 1 2/3 cups
a) 1 1/6 cups
A gardener waters 1/2 of a garden bed each day. How many garden beds are watered in 6 days?
a) 2 beds
b) 3 beds
c) 4 beds
d) 5 beds
b) 3 beds
Find the LCD of the fractions 4/6 and 2/3. Then change fractions.
LCD= 6
4/6 stays 4/6
2/3 changes to 4/6
What would be the best estimate for the difference of 11 1/12 and 6 1/3?
a) A little more than 5
b) A little less than 5
c) Between 3 and 4
d) A little more than 5
a) A little more than 5
Mark has 7 1/5 pounds of apples. He gives 4 3/10 pounds to his friend. How many pounds of apples does he have left?
a) 2 4/5 pounds
b) 2 9/10 pounds
c) 3 1/5 pounds
d) 3 4/5 pounds
b) 2 9/10 pounds
A runner drinks 3/4 of a liter of water every hour. How much water does the runner drink in 4 hours?
a) 2 liters
b) 3 liters
c) 4 liters
d) 5 liters
b) 3 liters
Find the LCD of the fractions 2/4 and 1/6. Then change the fractions.
LCD= 24
2/4 changes to 12/24
1/6 changes to 4/24
What would be the best estimate for the sum of 6 5/6 and 4 6/8?
a) A little more than 12
b) Between 10 and 11
c) A little less than 12
d) A little more than 10
c) A little less than 12
A recipe requires 2 1/4 cups of milk and 1 2/3 cups of cream. How much more milk than cream does the recipe require?
a) 1/2 cup
b) 2/3 cup
c) 3/4 cup
d) 5/6 cup
b) 2/3 cup
A painter uses 5/8 of a gallon of paint for each wall. How much paint is needed for 12 walls?
a) 6 gallons
b) 7 gallons
c) 8 gallons
d) 9 gallons
d) 9 gallons