Multiplying Fractions
If you have 4 copies of 1/3, how would you write that as an addition sentence? How would you write it as a multiplication sentence?
1/3 + 1/3 + 1/3 + 1/3
1/3 x 4
How many "one-fifths" (1/5) do you need to build the whole number 3?
15
Is 5/10 closer to 0, 1/2 , or 1?
Equal to 1/2
If you start at 0 and take 3 jumps of 2/3, where do you land?
2
A baker needs 3/4 cup of sugar for one cake. If he makes 3 cakes, does he need more or less than 2 cups of sugar?
More than 2
A student says that 3 x 2/4 is the same as 6 x 1/4 Use a tape diagram to explain why they are right.
Show Ms. Kuhn!
Break the mixed number 4 1/3 into two parts: a whole number and a fraction. Then, rewrite that whole number as a fraction.
4 and 1/3
12/3
If a bird has a wingspan of 2 7/8 feet, is it closer to 2 feet or 3 feet?
3 feet
You are at 1 1/4 on the number line. How many more "fourths" do you need to jump to reach the whole number 3?
7 more fourths
A trail is 10 miles long. If you walk 4 2/10 miles and stop for water, then walk another 3 5/10 miles, how much of the trail is left?
2 3/10
Which is larger: 4 x 1/2 or 10 x 1/5?
They are the same!
Rename 5 as 4 + ?/4.
4 + 4/4
Estimate 3 4/10 + 5 7/10. Will the answer be more or less than 9?
More than 9.
In a pattern that adds 3/4 each time, will you ever land exactly on a whole number? Explain.
3/4, 6/4, 9/4, 12/4=3
Yes!
A juice bottle holds 6 1/4 ounces. If you drink 3 bottles, how many total ounces did you drink?
18 3/4
3 x 4/5
12/5= 2 2/5
If you have the sum 2 2/3 + 1 2/3, how many total "thirds" do you have? Then, convert that total back into a mixed number.
8/3 + 5/3= 13/3
4 1/3
Use the benchmark of 1/2 to compare 3/8 and 3/4. Which is larger?
3/4 because 3/8 is less than 1/2.
If a pattern starts at 1/2 and every step adds 1/2 what is the rule for which steps will land on an even whole number (like 2, 4, 6)?
Every other step will be a whole number.
A scientist is measuring insects. The first is 1 3/8 inches, the second is 2 5/8 inches, and the third is 1 1/8 inches. What is their combined length?
5 1/8
Create two different multiplication expressions (a whole number times a fraction) that both equal 12/8.
12 x 1/8
6 x 2/8
3 x 4/8
4 x 3/8
2 x 6/8
Convert into a mixed number: 11/4.
2 3/4
Place these three values on a number line from least to greatest: 11/3 , 3 1/2, and 4.
3 1/2, 11/3, 4
Describe the "distance" between 2 1/8 and 3 5/8 in terms of how many 1/8 jumps you would take.
12 jumps
A plant grows 2/3 of an inch every week. How many weeks will it take for the plant to grow at least 5 inches tall?
8 weeks