subtract mixed numbers
DESCRIPTION
Subtract Mixed Numbers. 6.C.1.a Add & Subtract fractions and mixed numbers and express answers in simplest form. Quick Review. Remember that when you subtract fractions you may need to rename the first mixed number. Subtract the fractions. 1. 3. 13. 6. -. 6. 4. Step 1:. - PowerPoint PPT PresentationTRANSCRIPT
6.C.1.a Add & Subtract fractions and mixed numbers and express answers in simplest form.
Remember that when you subtract fractions you may need to rename the first mixed number.
13 - 6 3416
Find the least common denominator (LCD) of the fractions.
13-
6 34
=
=
912
212
16
13 - 6 912212
Rename using 12 as the denominator13212
= 12+
212
= 13
= 12 12
12
212+
1+
+
212+
= 121412
13212
Our new subtraction problem is:
13-
6 912
=
= 6 9
12
121412212
Subtract the fractions.
6 912
121412-
512
Subtract the whole numbers
6 912
121412-
5126
Simplify the fraction into lowest terms. In this case the fraction is in lowest
terms.
5126
8 - 2 4538
Find the least common denominator (LCD) of the fractions.
8-
2 45
=
=
3240
1540
38
8 - 232401540
Rename using 40 as the denominator8 1540
= 7+
1540
= 8
= 7 40
40
1540+
1+
+
1540+
= 7 5540
8 1540
Our new subtraction problem is:
8-
2 3240
=
= 2 32407 554015
40
Subtract the fractions
2 32407 5540-
2340
Subtract the whole numbers
2 32407 5540-
23405
Simplify the fraction in lowest terms. In this case the fraction is in lowest
terms.
23405
6 - 3 2517
Find the least common denominator (LCD) of the fractions.
6-
3 25
=
=
1435
535
17
6 - 31435535
Rename using 35 as the denominator
6 535
= 5+
535
= 6
= 5 35
35
535+
1+
+
535+
= 5 4035
6 535
Our new subtraction problem is:
6-
3 1435
=
= 3 14355 40355
35
Subtract the fractions.
3 14355 4035-
2635
Subtract the whole numbers.
3 14355 4035-
26352
Simplify the fraction in lowest terms. In this case the fraction is in lowest
terms.
26352
Subtract
8 - 5 7938
Subtract
9 - 5 8915