Math Lesson 59 Subtracting Mixed Numbers with Renaming

Complete the equation. 5 3/4 = 4 ?/4 a. 6 b. 7 c. 8 d. 9

b. 7

Complete the equation. 10 = 9 ?/8 a. 16 b. 8 c. 4 d. 1

b. 8

Add or subtract. Write in simplest form. 3 1/5 - 1 3/4 a. 9/20 b. 4 19/20 c. 1 9/20 d. 5 3/5

c. 1 9/20

A board measures 9 2/3 feet. A piece measuring 5 7/8 feet is cut off. Find the length of the remaining board. a. 3 9/11 feet b. 4 1/2 feet c. 3 19/24 d. 3 9/24

c. 3 19/24

How much longer is 1 1/2 inches than 3/4 inch? a. 1 inch b. 1/2 inch c. 3/4 inch d. 1/4 inch

c. 3/4 inch

Add or subtract. Write in simplest form. 9 - 3 1/7 a. 6 b. 6 1/7 c. 5 6/7 d. 12 1/7

c. 5 6/7

Add or subtract. Write in simplest form. 2 2/5 - 1 2/3 a. 4 1/15 b. 7/15 c. 4 d. 11/15

d. 11/15

Add or subtract. Write in simplest form. 6 - 3 1/2 a. 3 1/2 b. 3 c. 9 1/2 d. 2 1/2

d. 2 1/2

Identify the subtraction problem that does not need to be renamed before subtracting. a. 7 - 2 1/2 b. 9 1/3 - 4 2/3 c. 6 3/10 - 2 7/10 d. 3 5/8 - 2 3/8

d. 3 5/8 - 2 3/8

Complete the equation. 8 2/3 = 7 ?/3 a. 8 b. 7 c. 6 d. 5

d. 5

A recipe for spaghetti sauce calls for 1 2/3 cups of tomato sauce. A can of tomato sauce holds 2 1/2 cups. How much tomato sauce will be left? a. 3/5 cup b. 1/2 cup c. 1/3 cup d. 5/6 cup

d. 5/6

Add or subtract. Write in simplest form. 1 1/3 - 1/2 a. 1/2 b. 2/3 c. 1 5/6 d. 5/6

d. 5/6

Add or subtract. Write in simplest form. 2 1/6 - 1 1/3 a. 2 8/9 b. 1 1/2 c. 3 1/2 d. 5/6

d. 5/6

Add or subtract. Write in simplest form. 1/6 + 1/8 a. 1/12 b. 1/48 c. 1/7 d. 7/24

d. 7/24

the pilot announces at the beginning of your flight that it will take two and a half hours to reach your destination. You have been on your flight for 3/4 of an hour. Explain how you would find the time you have left on your flight.

2 1/2 - 3/4 = 1) you write your problem 2 2/4 - 3/4 = 2) rename your problem 1 4/4 + 2/4 - 3/4 = 3) rename 1 6/4 - 3/4 = 1 3/4 4) solve and reduce if you have to

Tom is correct. Jeremy incorrectly subtracted the fraction part by subtracting 1/2 from 2/2 instead of subtracting 0 from 1/2.

Jeremy and Tom are finding 9 1/2 - 3. Who is correct? Explain.

subtracting mixed numbers with renaming

Sometimes it is necessary to rename the fraction part of a mixed number as an improper fraction in order to subtract. Let's try it!

c. 53 29/30 mi

The table above lists the lengths of five famous tunnels. What would the length of a tunnel made by placing these five tunnels end to end? a. 51 29/30 mi b. 53 27/30 mi c. 53 29/30 mi d. 52 14/15 mi

Add or subtract. Write in simplest form. 5 - 2 1/2 a. 7 1/2 b. 2 1/2 c. 3 1/2 d. 3

b. 2 1/2

Find the sum. 7 12/13 + 4 3/13 a. 12 2/13 b. 13/103 c. 13/158 d. 4 3/12

a. 12 2/13

Add or subtract. write in simplest form. 10 - 4 1/2 a. 5 1/2 b. 6 1/2 c. 6 d. 14 1/2

a. 5 1/2

Complete the equation. 9 = 8 ?/6 a. 6 b. 8 c. 4 d. 12

a. 6