Calculating Expressions and Equations

Mrs. Scooby Groves guides students through lesson five practice of unit four, covering various mathematical problems. The video includes solving tape diagram problems, calculating remaining peanut butter, determining water consumption, identifying expressions greater than a positive number, and calculating heart rate. Each problem is explained step-by-step, with emphasis on understanding fractions, equations, and multiplication.

What is the equation for Y if it is three-fifths of X?

• Y = X / 3/5

• Y = X - 3/5

• Y = 3/5 * X

• Y = 3/5 + X

If X is 6/11 of Y, what is the reciprocal equation in terms of Y?

• Y = 11/6 * X

• Y = 6/11 * X

• Y = X / 11/6

• Y = X * 11/6

How many ounces of peanut butter are left after the family eats 0.3 of it?

• 60 ounces

• 56 ounces

• 80 ounces

• 24 ounces

Which expression correctly calculates the remaining peanut butter?

• 80 * 0.3

• 80 + 0.3

• 80 - 0.3

• 80 * 0.7

How much water did the football team drink in total?

• 25 gallons

• 50 gallons

• 75 gallons

• 100 gallons

How many books does Han have if he has one-third less than Jada's 12 books?

• 16 books

• 4 books

• 12 books

• 8 books

Which expression is greater than X if X is a positive number?

• 7/8 * X

• 5/4 * X

• 1/2 * X

• 3/4 * X

Is Noah's heart rate typical if he counts 8 heartbeats in 10 seconds?

• It cannot be determined.

• No, it is above the typical range.

• No, it is below the typical range.

• Yes, it is typical.

What is the equation for H, the number of heartbeats per minute for Noah?

• H = 48 * M

• H = 60 * M

• H = 8 * M

• H = 10 * M

What is the unit rate of Noah's heartbeats per minute?

• 10 heartbeats

• 48 heartbeats

• 60 heartbeats

• 8 heartbeats