Which expression is equivalent to 4.8 - 7.2? Step 1: Solve the given expression 4.8 - 7.2 = -2.4

4.8 + (-7.2) = 4.8 - 7.2 = -2.4

4.8 - (-7.2) = 4.8 + 7.2 = 12.0

Which expression is equivalent to 6.3 - 9.1? Step 1: Solve the given expression 6.3 - 9.1 = -2.8

6.3 + (-9.1) = 6.3 - 9.1 = -2.8

6.3 - (-9.1) = 6.3 + 9.1 = 15.4

A $250 laptop has a 30% discount. Jake incorrectly got $75 as the final sale price. Explain his mistake. Answer: 30% of $250 is **0.30 × 250 = 75**. - Jake mixed up the **$75** (the discount amount) as the final price. - Correct sale price = **$250 - 75 = 175**.

He found the discount, not the final price.

He subtracted 30% instead of adding it.

He took off $30 instead of 30%.

A $180 jacket has a 25% discount. Mia incorrectly got $45 as the final sale price. Explain her mistake. Answer: 25% of $180 is 0.25 × 180 = 45 . - Mia mixed up the $45 (the discount amount) as the final price. - Correct sale price = $180 - 45 = 135 .

He found the discount, not the final price.

She subtracted 25% instead of adding it.

She took off $25 instead of 25%.

A $320 TV has a 35% discount. Alex incorrectly got $112 as the final sale price. Explain his mistake.

He found the discount, not the final price.

He subtracted 35% instead of adding it.

He took off $35 instead of 35%.

Math 7 3A v1 SY25

Quiz

•

Mathematics

•

6th - 8th Grade

•

Practice Problem

•

Medium

•

CCSS

6.RP.A.3C, 6.EE.A.4, 7.NS.A.1B

+4

Standards-aligned

Eric Henderson

Used 15+ times

FREE Resource

21 questions

Show all answers

1.

MULTIPLE SELECT QUESTION

15 mins • 1 pt

Select all expressions that are equivalent to -2(y + 5) - 3y + 6
Step 1> -2(y + 5) - 3y + 6.
Step 2 Distribute > -2y - 10 - 3y + 6
Step 3 Combine like > -2y - 3y - 10 + 6
Step 4 final result > -5y - 4

-5y - 4

-2y + 5 - 3y + 6

-10y

-2y + (-10) - 3y + 6

-2y - 3y + 6 - 10

Tags

CCSS.6.EE.A.4

2.

MULTIPLE SELECT QUESTION

15 mins • 1 pt

Select all expressions that are equivalent to -3(x + 7) - 4x + 8.
Step 1> -3(x + 7) - 4x + 8.
Step 2 Distribute > -3x - 21 - 4x + 8.
Step 3 Combine like terms > -3x - 4x - 21 + 8.
Step 4 Final result > -7x - 13.

-7x - 13

-3x + 7 - 4x + 8

-12x

-3x + (-21) - 4x + 8

-3x - 4x + 8 - 21

Tags

CCSS.6.EE.A.4

3.

MULTIPLE SELECT QUESTION

15 mins • 1 pt

Select all expressions that are equivalent to -3(x + 7) - 4x + 8.

-7x - 13

-3x + 7 - 4x + 8

-12x

-3x + (-21) - 4x + 8

-3x - 4x + 8 - 21

Tags

CCSS.6.EE.A.4

4.

MULTIPLE SELECT QUESTION

15 mins • 1 pt

Select all expressions that are equivalent to -4(z + 6) - 5z + 9.

-9z - 15

-4z + 6 - 5z + 9

-20z

-4z + (-24) - 5z + 9

-4z - 5z + 9 - 24

Tags

CCSS.6.EE.A.4

5.

DROPDOWN QUESTION

15 mins • 1 pt

Emily is calculating a 30% sales tax. She should (a) (a) the total by 10 to find 10%, then multiply by (b) (b) to find 30%.

1.5

10

multiply

subtract

Divide

3

5

Answer explanation

To find 30% of a total:
1️⃣ Divide by 10 to get 10% (since 10% = total ÷ 10).
2️⃣ Multiply by 3 to adjust from 10% to 30% (since 30% = 3 × 10%).
This method quickly estimates the tax amount without complex calculations.

Tags

CCSS.6.RP.A.3C

6.

DROPDOWN QUESTION

15 mins • 1 pt

Liam is calculating a 20% sales tax. He should (a) (a) the total by 10 to find 10%, then multiply by (b) (b) to find 20%.

1.5

10

multiply

subtract

5

Divide

2

Answer explanation

To find 15% of a total:
1️⃣ Divide by 10 to get 10% (since 10% = total ÷ 10).
2️⃣ Multiply by 2 to adjust from 10% to 20% (since 20% = 2 × 10%).
This method quickly estimates the tax amount without complex calculations.

Tags

CCSS.6.RP.A.3C

7.

DROPDOWN QUESTION

15 mins • 1 pt

Sophia is calculating a 40% sales tax. She should (a) (a) the total by 10 to find 10%, then multiply by (b) (b) to find 40%.

1.5

10

multiply

subtract

5

Divide

4

Tags

CCSS.6.RP.A.3C

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Math 7 3A v1 SY25

21 questions

Select all expressions that are equivalent to -2(y + 5) - 3y + 6Step 1> -2(y + 5) - 3y + 6.Step 2 Distribute > -2y - 10 - 3y + 6Step 3 Combine like > -2y - 3y - 10 + 6Step 4 final result > -5y - 4

Select all expressions that are equivalent to -3(x + 7) - 4x + 8.Step 1> -3(x + 7) - 4x + 8. Step 2 Distribute > -3x - 21 - 4x + 8. Step 3 Combine like terms > -3x - 4x - 21 + 8. Step 4 Final result > -7x - 13.

Select all expressions that are equivalent to -3(x + 7) - 4x + 8.

Select all expressions that are equivalent to -4(z + 6) - 5z + 9.

Emily is calculating a 30% sales tax. She should (a) ​ (a) the total by 10 to find 10%, then multiply by (b) ​ (b) to find 30%.

To find 30% of a total:1️⃣ Divide by 10 to get 10% (since 10% = total ÷ 10).2️⃣ Multiply by 3 to adjust from 10% to 30% (since 30% = 3 × 10%).This method quickly estimates the tax amount without complex calculations.

Liam is calculating a 20% sales tax. He should (a) ​ (a) the total by 10 to find 10%, then multiply by (b) ​ (b) to find 20%.

To find 15% of a total:1️⃣ Divide by 10 to get 10% (since 10% = total ÷ 10).2️⃣ Multiply by 2 to adjust from 10% to 20% (since 20% = 2 × 10%).This method quickly estimates the tax amount without complex calculations.

Sophia is calculating a 40% sales tax. She should (a) ​ (a) the total by 10 to find 10%, then multiply by (b) ​ (b) to find 40%.

Which expression is equivalent to 4.8 - 7.2?Step 1: Solve the given expression 4.8 - 7.2 = -2.4

Which expression is equivalent to 6.3 - 9.1? Step 1: Solve the given expression 6.3 - 9.1 = -2.8

Which expression is equivalent to 5.7 - 8.4?

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Select all expressions that are equivalent to -2(y + 5) - 3y + 6
Step 1> -2(y + 5) - 3y + 6.
Step 2 Distribute > -2y - 10 - 3y + 6
Step 3 Combine like > -2y - 3y - 10 + 6
Step 4 final result > -5y - 4

Select all expressions that are equivalent to -3(x + 7) - 4x + 8.
Step 1> -3(x + 7) - 4x + 8.
Step 2 Distribute > -3x - 21 - 4x + 8.
Step 3 Combine like terms > -3x - 4x - 21 + 8.
Step 4 Final result > -7x - 13.

Emily is calculating a 30% sales tax. She should (a) (a) the total by 10 to find 10%, then multiply by (b) (b) to find 30%.

To find 30% of a total:
1️⃣ Divide by 10 to get 10% (since 10% = total ÷ 10).
2️⃣ Multiply by 3 to adjust from 10% to 30% (since 30% = 3 × 10%).
This method quickly estimates the tax amount without complex calculations.

Liam is calculating a 20% sales tax. He should (a) (a) the total by 10 to find 10%, then multiply by (b) (b) to find 20%.

To find 15% of a total:
1️⃣ Divide by 10 to get 10% (since 10% = total ÷ 10).
2️⃣ Multiply by 2 to adjust from 10% to 20% (since 20% = 2 × 10%).
This method quickly estimates the tax amount without complex calculations.

Sophia is calculating a 40% sales tax. She should (a) (a) the total by 10 to find 10%, then multiply by (b) (b) to find 40%.

Which expression is equivalent to 4.8 - 7.2?
Step 1: Solve the given expression 4.8 - 7.2 = -2.4

Which expression is equivalent to 6.3 - 9.1?
Step 1: Solve the given expression
6.3 - 9.1 = -2.8