Adding Unlike Fractions Chapter 6. Miss Valora 6 th grade. Adding and Subtracting fractions :. When adding and subtracting fractions is the same as adding and subtracting whole numbers. Example:
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Miss Valora 6th grade
A family drinks a gallon of milk during the first part of the week and then drinks 3 quarts of milk during the second part of the week. How much milk did the family during for the entire week?
Which operation should be used to find the total amount of milk consumed by the family for the entire week?
Is it correct to say the family drank 4 gallons of milk during the week?
Is it correct to say the family drank 4 quarts of milk during the week?
+
+
I can now + the quarts together because the partitions are the same size.
Remember we are adding parts of a whole!
30 ft
50 yards
+
180 ft without sprinting.
150 ft
+
30 ft
=
Remember parts need to be related to the same whole!!!
Remember to ask these questions
5
2
7
Two parts of a whole
Distance from 0 to 1
Yes, because the are whole numbers pertaining to the whole.
0
1
2
3
4
5
6
7
8
9
10
Yes, because the partitions are the same size from the whole!!
107=3
0
1
2
3
4
5
6
7
8
9
10
These are the keys that you need to understand!
whole
size
parts
What’s being added?
Do they refer to the same whole?
Are the partitions for both parts the same size? Explain
+
The whole is 1 cup of oil.
1cup
+
1/3
+
2/3
=
1cup
+
1cup

450 or 5/6 students
Is the whole defined?
What is the whole?