Multi Step Problems with Rational Numbers

Carlos uses a cleaner after working in his garage. The bottle contains 64.2 mL of cleaner. He used 5.8 mL of the cleaner on Monday. On Tuesday, he used half of the remaining cleaner on a chemical spill. On Wednesday, he used 3.9 mL of the cleaner in the bottle. How many mL of cleaner did Carlos have left on Thursday?

• 58.4

• 29.2

• 25.3

• 12.15

One weekend, Latoya and Tyler mowed lawns to earn spending money. They are paid as a team $13.50 an hour. They worked for 8 hours. Each received half the total earnings. If Latoya then spent $18 on a video game, how much money did she have left?

• $108

• $54

• $36

• $90

Angelo has $5.50 for lunch. He buys a cookie for $1.05 and a drink for 1.45. How much money does Angelo have left?

• $2.50

• $3.00

• $1.25

• $4.00

Nik brought a bag of candy to school. He started with 50 pieces, but gave out 15 pieces to EACH of his TWO friends. His nice math teacher gave Nik 3 pieces of candy. How much does he have now?

• 37 pieces

• 10 pieces

• 0 pieces

• 23 pieces

Aryon has $20. He buys 2 Cokes that each cost $1.50. He also buys a sandwich for $5.50 and a bag of chips that costs $2.25. After Aryon pays for his lunch, how much money does he have left?

• $10

• $10.75

• $9.25

• $0

Ms. Hockless is trying to do a math problem that involves fractions but needs help. What would be a good way to show her?

• Convert the fractions to decimals by dividing numerator by the denominator and then solve

• Just add all the numbers on the fractions together

• Convert all of the fractions to percents and then solve

• Draw pictures of the fractions and just make a good guess at the answer

Erica has $14 and plans to save $5 each week until she has the $64 she needs for a new jacket.  How many weeks will it take Erica to save money for a new jacket?

• 11 weeks

• 10 weeks

• 12 weeks

• 13 weeks

Ms. Sublett's math class is putting three numbers (0.3, 1/4, and 20%) in order from least to greatest. Which answer is correct?

• 1/4, 20%, 0.3

• 0.3, 20%, 1/4

• 20%, 1/4, 0.3

• 0.3, 1/4, 20%

Devon had his two friends over for pizza. Devon ate 1/4 of the pizza. One of his friends ate 3/8 of the pizza and the other friend ate 1/8 of the pizza. How much of the pizza is left?

• 1/4

• 1/8

• 1/3

• 1/5

Chris decided to do his history homework a little bit each night. On the first night he did 1/5 of the homework, the second night he completed 1/4 of the homework, and the third night he worked 1/2 of the homework. How much of the homework has Chris completed?

• 19/20 or .95

• 1/2 or .5

• 1/3 or .33

• 1/10 or .1