Calculating Discounts by Hand

In this video, Mr. J explains how to calculate a discount by hand without using a calculator. The process involves converting a percentage to a decimal, multiplying the original price by this decimal to find the discount amount, and then subtracting this discount from the original price to determine the final sale price. The video provides a step-by-step guide using an example of a 35% discount on $78.95, demonstrating the calculations involved in each step.

What is the first step in calculating a discount by hand?

• Subtract the discount from the original price

• Convert the percentage to a decimal

• Multiply the original price by the discount rate

• Round the discount to the nearest cent

How do you convert 35% to a decimal?

• Move the decimal two places to the left

• Add a zero at the end

• Multiply by 100

• Divide by 10

What is the decimal form of 35%?

• 35.0

• 0.35

• 3.5

• 0.035

Tags

CCSS.5.NBT.B.7

When multiplying decimals, what should you do with the decimal points initially?

• Subtract them

• Multiply them directly

• Ignore them until the end

• Add them together

Tags

CCSS.5.NBT.B.7

What is the product of 78.95 and 0.35 before placing the decimal?

• 27.6325

• 276.325

• 27632.5

• 2763.25

Tags

CCSS.5.NBT.A.4

To what place value should you round the discount when dealing with money?

• Thousandths

• Hundredths

• Whole number

• Tenths

Tags

CCSS.5.NBT.B.7

What is the rounded discount amount from $78.95 at 35%?

• $27.65

• $27.60

• $27.64

• $27.63

Tags

CCSS.6.RP.A.3C

What is the final step in calculating the sale price?

• Divide the original price by the discount

• Subtract the discount from the original price

• Add the discount to the original price

• Multiply the discount by the original price

Tags

CCSS.6.RP.A.3C

What is the final sale price after a 35% discount on $78.95?

• $51.32

• $60.00

• $50.00

• $55.00

Tags

CCSS.5.NBT.B.7

Why is it important to line up decimals when subtracting?

• To make multiplication easier

• To make the numbers look neat

• To ensure accurate subtraction

• To ensure accurate addition

Tags

CCSS.5.NBT.B.7