Mastering Rate Problems in Mathematics

The video tutorial explains how to solve two mathematical problems using division and multiplication. The first problem involves calculating how many cars Lynnette can wash in 11 days, given she can wash 95 cars in 5 days. The second problem involves determining the cost of 6 batteries when 8 batteries cost $10. The instructor demonstrates how to find unit rates and use them to solve the problems, emphasizing mental math and step-by-step calculations.

What is the first step to solve the problem of how many cars Lynnette can wash in 11 days?

• Multiply 19 by 11

• Divide 11 by 5

• Divide 95 by 5

• Multiply 95 by 11

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CCSS.3.OA.D.8

If Lynnette can wash 95 cars in 5 days, how many cars can she wash in one day?

• 15

• 18

• 19

• 20

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CCSS.3.OA.A.3

What is the total number of cars Lynnette can wash in 11 days?

• 220

• 190

• 200

• 209

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CCSS.3.OA.A.3

What is 95 divided by 5?

• 18

• 19

• 20

• 21

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CCSS.4.NBT.B.6

If 8 batteries cost $10, what is the cost of one battery?

• $1.75

• $1.25

• $1.50

• $1.00

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CCSS.6.RP.A.3B

How much do 6 batteries cost if one battery costs $1.25?

• $8.00

• $6.00

• $7.00

• $7.50

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CCSS.6.NS.B.3

What is the cost of 6 batteries if 8 batteries cost $10?

• $7.50

• $7.25

• $6.25

• $8.25

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CCSS.6.RP.A.3B

What is the equivalent of 10 divided by 8 in terms of fractions?

• 2/5

• 3/4

• 4/5

• 5/4

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CCSS.5.NF.B.3

What is the decimal equivalent of 5/4?

• 1.35

• 1.30

• 1.25

• 1.20

What is another method to find the cost of 6 batteries?

• Multiply 6 by 8

• Divide 6 by 10

• Divide 6 by 8

• Multiply 6 by 10

Tags

CCSS.3.OA.A.3