Mathematical Problem Solving Techniques

Mr. Richards reviews homework problems from unit 6, lesson 2, covering topics such as true and false equations, word problems involving water bottles and pencil lengths, matching equations with solutions, calculating vitamin C content, and understanding percentages in a band scenario. The session concludes with a focus on multiplication and place value.

Which of the following equations is true?

• 15 x 0 = 0

• 5 + 0 = 0

• 4 2/3 = 5 - 1/3

• 2/3 x 5/9 = 7/12

If Mae drank X ounces of water and 10 ounces were left, which equation represents the amount she drank?

• 24 / 10 = X

• 24 + 10 = X

• 24 - 10 = X

• 10 x X = 24

Priya has 5 pencils each X inches long, and they measure 34.5 inches end-to-end. Which equation is correct?

• 34.5 x 5 = X

• 5 + X = 34.5

• 5 x X = 34.5

• 34.5 / 5 = X

What is the solution to the equation 2 x ? = 4.6?

• 9.2

• 4.6

• 1.15

• 2.3

How many milligrams of vitamin C are in an orange if it contains 75% of the daily recommended allowance of 45 mg?

• 33.75 mg

• 45 mg

• 11.25 mg

• 22.5 mg

If 20% of 90 kids own their instruments, how many kids own them?

• 18

• 72

• 45

• 90

What is the product of 0.25 and 1.4?

• 0.36

• 0.28

• 0.14

• 0.35

Which of the following represents 61 x 0.43?

• 2.623

• 262.3

• 26.23

• 0.2623

Calculate the product of 1017 and 72.

• 70224

• 73024

• 72024

• 73224

What is the result of multiplying 5226 by 37?

• 190262

• 193362

• 190362

• 193262