Practice the problems of Math in Focus Grade 3 Workbook Answer Key Chapter 10 Money to score better marks in the exam.
Math in Focus Grade 3 Chapter 10 Answer Key Money
Math Journal
Solve. Use bar models to help you. Choose whether to add or subtract. Then solve.
Question 1.
Lynn spends $5.20 on breakfast. She spends $1.85 more on breakfast than on dinner. How much does she spend on both meals?
Step 1:
Draw the bar model.
Step 2:
Find _____________
Add / Subtract $__________ from $__________.
Step 3:
Find _____________
Add / Subtract $__________ to $__________.
She spends $__________ on both meals.
Answer:
Step 1:
Step 2:
Find how much she spends on dinner?
Subtract $1.85 from $5.20.
Step 3:
Find how much she spends on both meals?
Add $5.20 to $3.35.
She spends $8.55 on both meals.
Look at the problem. Then find the mistake.
Aaron made a mistake while subtracting.
Question 2.
Was the mistake made in subtracting the cents?
Answer:
No, the mistake not made in subtracting the cents.
Question 3.
Was the mistake made in subtracting the dollars?
Answer:
Yes, the mistake made in subtracting the dollars
Question 4.
Find the correct answer.
Answer:
Explanation:
Subtract $8.40 from $15.25 the difference is $6.85. The correct answer is $6.85.
Here’s another problem with a mistake.
Question 5.
What is the mistake?
Answer:
The mistake made in adding the dollars.
Question 6.
Find the correct answer.
Answer:
Add $9.95 with $7.30 the sum is $17.25. The correct answer is $17.25.
Put On Your Thinking Cap!
Challenging Practice
Look at the pictures. Solve the real-world problems.
Question 1.
Ms. O’Brien needs to get 6 bottles of shampoo for her childcare center. How much will she spend?
Answer:
For 3 bottles
$5.50 x 2 = $11
For 6 bottles
$11 x 2 = $22
She spend $22.
Explanation:
Ms. O’Brien needs to get 6 bottles of shampoo for her childcare center. In the above image we can observe Buy 2 get 1 free with a cost of $5.50. Multiply $5.50 with 2 the product is $11. The 3 bottles cost is $11. Multiply $11 with 2 the product is $22. The cost of 6 bottles is $22. She spend $22.
Question 2.
Mrs. Keith wants to spend the least amount of money to buy 3 gallons of milk. Which bottle should she buy?
Answer:
For 1/2 gallon bottle
2 x 1/2 gallon
2 x $1.85 = $3.70
For 1 gallon bottle cost is $3.79.
She buys 1/2 gallon of bottle.
Explanation:
Mrs. Keith wants to spend the least amount of money to buy 3 gallons of milk. The cost of 1/2 gallon bottle is $3.70. The cost of 1 gallon bottle is $3.79. So she buys 1/2 gallon of bottle.
Put On Your Thinking Cap!
Solve.
Question 1.
Harry has some money. His sister has $75.10. After he gives $28 to his mother, he has $15.20 less than his sister. How much does Harry have at first?
Answer:
$28 – $15.20 = $12.80
$75.10 + $12.80 = $87.90
Harry have $87.90 at first.
Explanation:
Harry has some money. His sister has $75.10. After he gives $28 to his mother, he has $15.20 less than his sister. Subtract $15.20 from $28 the difference is $12.80.
Add $75.10 with $12.80 the sum is $87.90. Harry have $87.90 at first.
Question 2.
Kate saves some money. She saves only dimes and quarters. She has the same number of dimes and quarters. There are less than 1 2 coins but more than 5 coins altogether. How much could she have saved?
Answer:
Dimes = 10¢
Quarter = 25¢
3 x 10¢ + 3 x 25¢
30¢ + 75¢
$1.05
She have saved $1.05.
Explanation:
Kate saves some money. She saves only dimes and quarters. She has the same number of dimes and quarters. There are less than 12 coins but more than 5 coins altogether. Both 3 dimes and 3 quarters are equal to 6 coins. Multiply 3 with 10¢ the product is 30¢. Multiply 3 with 25¢ the product is 75¢. Add 30¢ with 75¢ the sum is $1.05. She have saved $1.05.