Decomposing Fractions
What are 2 ways to decompose 8/16?
1/5 = ?/20
3/5 + 2/5=?
5/5 or 1 whole
3/4-1/4=?
What are two ways to decompose 4/6?
Answers may vary but might include 2/6 + 2/6 and 3/6 + 1/6
2/3= ?/24
16
Use a number line to show 2/8 + 3/8=?
Check board, should show number line divided into eighths and a point on 2/8 with three hops to 5/8
Use a number line to show 8/8 - 3/8=?
Should show number line divided into eights starting at 1 and jumping back 3 to 5/8
What are two ways to decompose 5/15?
8/16 = ?/2
Draw a model and use two different colors to show 2/4+1/4=?
Check board. Should show a model cut into fourths with 2/4 shaded one color and 1/4 shaded another color to equal 3/4
Draw a model to show 8/8-5/8=?
Should have a model cut into eighths with the entire shape shaded in with 5/8 crossed out leaving 3/8
What are three ways to decompose 25/30?
Answers may vary but might include 5/30+20/30, 15/30 + 10/30 and 10/30 + 10/30 + 5/30
8/24 = 1/?
3
What is 3/9+7/9=?
10/9 (improper fraction) or 1 1/9 (mixed number)
Bob has 4/8 of a pizza left over. If he eats 2 slices of pizza for dinner, how much pizza will he have left for lunch tomorrow?
2/8 or 2 slices of pizza
Explain what the word decompose means when decomposing numbers and fractions and give an example.
The word decompose means to break apart. For example, if I decompose the number 10, I can break it up into 4+6 or 5+5 or 8+2 or 9+1 or 3+7
3/8 = ?/32
12
What is 10/10 + 2/10=?
12/10 (improper fraction) or 1 2/10 (mixed number)
13/10-3/10=?
10/10 or 1 whole