Adding Fractions
Subtracting Fractions
Adding Mixed Numbers
Subtracting Mixed Number
Estimatiing and LCD
100
5/11 + 4/11
9/11
100
11/15 - 6/15=
5/15 simplify divide by 5= 1/3
100
2 3/4 + 4 1/4=
6 4/4= simplified = 7
100
10 3/4 - 8 1/4=
2 2/4 simplify divide by 2= 2 1/2
100
Find the LCD of 9, 12, 24.
9= 9, 18, 27, 36, 45, 54, 63, 72, 81 12: 12, 24, 36, 48, 60, 72 24: 24, 48, 72, 96,120 LCD: 72
200
6/7 + 1/2
LCD=14, 12/14 + 7/14= 19/14 simplified= 1 5/14
200
5/6 - 1/6=
4/6 simplify divide by 2= 2/3
200
5 1/8 + 6 3/8=
11 4/8 simplify divide by 4= 11 1/2
200
3 20/21 - 2 6/21=
1 14/21 simplify divide by 7= 1 2/3
200
What is the LCD of 1/3 and 3/5?
3: 3, 6, 9, 12, 15, 20 5: 5, 10, 15, 20, 25 LCD: 15
300
3/8 + 1/4
LCD=8, 3/8 + 2/8 = 5/8
300
3/4 - 1/4=
2/4 simplified = 1/2
300
4 1/3 + 6 4/5=
LCD: 15= 4 5/15 + 6 12/15= 8 17/15= 11 2/15
300
A standard bowling lane is 41 1/2 inches wide. The width of a bowling lane and one gutter is 50 13/16 inches. What is the width of the gutter?
LCD: 16: 50 13/16 - 41 8/16= 9 5/16inches
300
What is the least common denominator used to add 7/10 + 7/12?
10: 10, 20, 30, 40, 50, 60, 70 12: 12, 24, 36, 48, 60 LCD: 60
400
3/12 + 4/5
1 and 1/20
400
5/8 - 1/4=
LCD: 8= 5/8 - 2/8= 3/8
400
5 5/12 + 2 1/6=
LCD: 12= 5 5/12 + 2 2/12= 7 7/12
400
5 1/8 - 2 3/4=
LCD: 8= 5 1/8 - 2 6/8= 41/8 - 22/8= 19/8 simplify= 2 3/8
400
What is 5 15/32 rounded to the nearest whole number? (estimate)
5, half of 32 is 16. Therefore the numerator is larger than the denominator so you leave the number the same
500
John walked 3/4 of a mile to the store. Then he walked 3/8 of a mile to his grandmother's house. How far did John walk in all?
1 and 1/8 miles
500
8/9 - 2/3=
LCD: 27= 24/27 - 18/27= 6/27 simplify divide by 3= 2/9
500
9 3/5 + 4 7/15=
LCD: 15 = 9 9/15 + 4 7/15= 13 16/15= 14 1/15
500
20 1/4 - 19 1/2=
LCD: 4= 20 1/4 - 19 2/4= 81/4 - 78/4 = 3/4
500
Estimate 6 1/2 - 4 2/3=
7 - 5= 2
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