Estimating Adding and Subtracting Mixed Numbers

You and your friend are making a project. You have 5/6 of a yard of fabric, and your friend has 2 1/12 yards of fabric. ABOUT how many yards of fabric do you have combined?

• 1 1/2 yards

• 2 yards

• 2 1/2 yards

• 3 yards

Danny had 4 1/5 candy bars. He told his brother he would give him 1/2 of a candy bar. How much did he have left?

A number written as a whole number and a fraction.

• Mixed Number

• Equivalent Fraction

• Improper Fraction

• Common Denominator

George used 1  3/4 pounds of Swiss cheese and 2  1/8 pounds of cheddar cheese to make a casserole.  Which expression is the best estimate for the number of pounds of cheese he used?

• 2  +  2

• 1  +  2

• 2  +  3 

• 1  +  3

What is the sum?

• 
• 
• 
• 

Jesus has 12 6/7 feet of yarn. Jenny has 11.5 feet of yarn. What is the best estimate of the amount of yarn Jesus and Jenny have altogether?

• 24 1/2

• 23

• 25

• 23 1/2

A baker uses food coloring to color cake batter. He needs 4 1/8 ounces of green food coloring. He only has 2 3/8 ounces. How much more food coloring does he need?

• 1 2/3 oz.

• 1 3/4 oz.

• 1 5/8 oz.

• 2 3/4 oz.

At a party, the guests ate 4  3/4 of the cookie cakes, and 5  2/3 of the sheet cakes.  They ate 12  1/2 of the pies.  How much more pie did the guests eat than the cookie cakes and sheet cakes?

• 2/3

• 3/4

• 2/3

• 1/12

• Yes; the actual difference is not less than 1.

• Yes; he did not use the correct benchmarks to estimate the difference.

• No; he correctly used common denominators to estimate the difference.

• No; the amount he subtracted is greater than the benchmark, so the actual difference will be less.

6

5 1/12

4 11/12

5 11/12

• 6

• 5 1/12

• 4 11/12

• 5 11/12