Adding & Subtracting Fractions
1/8 + 3/8 =
4/8
What is 1/3 × 3?
1
Change to a decimal: 7/10 = ?
0.7
Write as a decimal: 2/10 = ?
0.2
Is 0.7 = 0.70? Why or why not?
Yes, 0.7 is equal to 0.70 because adding a zero to the end of a decimal does not change its value.
7/12 − 2/12 = ?
5/12
What is 5 X 1/2?
5/2
Change to a decimal: 45/100 = ?
0.45
Write as a decimal: 19/100 = ?
0.19
Use >, <, or = : 0.45 __ 0.5
0.45 < 0.5
2 1/5 + 1 2/5 = ?
3 3/5
What is 2/5 × 4? Write it as a mixed number.
8/5= 1 3/5
Combine and write as a decimal: 7/10 + 4/100 = ?
0.74
What are two ways to write 4/10 as equivalent decimals?
0.4
0.40
Write true or false for the following...
1. 0.6 > 0.5
2. 0.12 > 0.25
3. 0.3 = 0.30
4. 0.4 = 0.04
1. True
2. False
3. True
4. False
Word problem: Maya has 3/4 yard of ribbon. She gives 1/4 yard to a friend. How much ribbon does Maya have left? Show your work.
3/4 − 1/4 = 2/4 = 1/2
One batch of cookies needs 2/3 cup sugar. How much sugar for 3 batches?
2/3 × 3 = 2 cups
Add as hundredths: 6/10 + 33/100. Show how you change 6/10 to hundredths first.
93/100
Change this mixed number to decimal: 1 5/10 = ?
1.5
Alex has 0.60 meter ribbon and Ben has 0.6 meter ribbon. Are these the same amount? Explain.
Yes, 0.60 = 60/100 and 0.6 = 6/10 = 60/100, so they are equal.
In a community garden, Alex paints 1/12 of the fence, and Bobby paints 3/12 of the fence. Charles paints the rest of the fence. What fraction of the fence does Charles paint?
8/12
Madison measures 1/2 of a foot of string for an activity. She needs 7 pieces of string with that same length.
Write and solve a multiplication equation that Zorana can use to find the total length of string that she needs. Write your answer as a mixed number.
7 X 1/2= 7/2
7/2= 3 1/2
Sam read 3/10 of a book yesterday and 47/100 today. How much of the book has he read so far? Give your answer as hundredths.
77/100
Show steps: Write 2 37/100 as a decimal.
2.37
Put these in order from least to greatest: 0.4, 0.5, 0.51, 0.499.
0.4, 0.49, 0.5, 0.51