Solving mathematical and real-world problems involving all forms of rational numbers

Plugging in a number for a variable is called

• operation

• evaluation

• substitution

• solving

Ms. Allen purchased a car for $18,799. The original price of the car was $2,799 more than Ms. Allen´s purchase price. Which is the best estimate of the original price of the car?

• $21,000

• $22,000

• $25,000

• $26,000

Rob hikes 2.89 miles every day for one week straight. At the end of the week, about how many miles did he hike in total?

Kathy wanted to buy a purse for $14.95 and a new poster for $23.95. She had $40.00 with her. Was that enough to buy the purse and the poster?

• Yes, because she only needed $39.8
• No, because she needed $42.60
• Yes, because she only needed $38.9
• No, because she needed $41.65

Jake added 1/8 cup of sunflower seeds and 4/5 cup of banana chips to his sundae. Which is the best estimate of the total amount of toppings Jake added to his sundae?

• about 2 cups

• about 1 cup

• about 1 1/2 cups

• about 1/2 cup

Kim is 3 7/8 inches taller than Cammie. If Kim is 60 7/9 inches tall, which is the best estimate of Cammie's height?

• 65 inches

• 64 inches

• 56 inches

• 57 inches

Multi-Step

Amanda picked 3/5 pound of blueberries at her local farm yesterday. She used 3/8 pound of blueberries. Today she picked 4/5 pound of blueberries. About how many pounds of blueberries does Amanda have now?

• 1/5 pound

• 1/2 pound

• 1 pound

• 1 1/2 pound

The fuel tank in Mr. Swenson’s car holds 16.5 gallons of fuel. The car consumes 1 gallon of fuel for each 24.3 miles driven. Mr. Swenson started a trip of 250 miles with a full tank of fuel. About how much fuel remained at the end of the trip?

• 5 gallons

• 6.5 gallons

• 7.5 gallons

• 10 gallons

Stephanie runs 5 days a week. Her distances for 5 days are 2.8 miles, 3.3 miles, 3.9 miles, 4.3 miles, and 4.9 miles. Which is the best estimate for the number of miles she ran?

• 21 miles

• 12 miles

• 23 miles

• 19 miles

What is the amount of error?

Estimated length: 32 in.

Actual length: 54 in.