This handy **Spectrum Math Grade 4 Answer Key Chapter 7 Lesson 7.5 Problem Solving**Ā provides detailed answers for the workbook questions.

## Spectrum Math Grade 4 Chapter 7 Lesson 7.5 Problem Solving Answers Key

**Solve each problem. Show your work.**

Question 1.

The cooks made 120 quarts of lemonade for the first concert. They made 150 quarts of lemonade for the second concert and 130 quarts for the third concert. How many gallons of lemonade did the cooks make for all three concerts?

They made _____________ gallons of lemonade in all.

Answer:

They made 100 gallons of lemonade in all.

Explanation:

Given,

No of quarts of lemonade for the first concert = 120

No of quarts of lemonade for the second concert = 150

No of quarts of lemonade for the third concert = 130

Total quarts = 120 + 150 + 130

= 400 quarts

Now convert quarts to gallons

1 gallon = 4 quarts

How many gallons are equal to 400 quarts

400 Ć· 4 = 100 gallons

Question 2.

A large ship was being loaded with 20 tons of grain and 5 tons of flour. How many more pounds of grain were there on the ship?

There were ______________ more pounds of grain.

Answer:

There were 40000 more pounds of grain.

Explanation:

Given,

No of tons of grain = 20

No of tons of flour = 5

To find: How many more pounds of grain were there on the ship?

1 ton = 2000 pounds

20 tons is equal to how many pounds

20 Ć 2000 = 40000 pounds of grain were there on the ship.

Question 3.

The largest wheel of cheese in City A weighs 985 pounds. The largest wheel of cheese in City B weighs 894 pounds. How many total ounces do both wheels of cheese weigh?

They weigh a total of ______________ ounces

Answer:

They weigh a total of 30064 ounces.

Explanation:

Given,

City A weighs 985 pounds

City B weighs 894 pounds.

Total weigh = 985 + 894

= 1879 pounds

1 pound = 16 ounces

1879 pounds is equal to how many ounces

1879 Ć 16 = 30064 ounces.

Question 4.

Tito stored 15 gallons of water in his basement. Jack stored 29 gallons of water in his basement. During the hurricane, they used 32 gallons of water. How many quarts of water did the boys have left after the hurricane?

Tito and Jack had ______________ quarts of water left.

Answer:

Tito and Jack had 48 quarts of water left.

Explanation:

Given,

Tito stored 15 gallons of water in his basement.

Jack stored 29 gallons of water in his basement.

During the hurricane, they used 32 gallons of water.

To find: How many quarts of water did the boys have left after the hurricane?

Total gallons of water = 15 + 29 = 44

Used water = 44 – 32

= 12 gallons are left

Now convert them to quarts

1 gallon = 4 quarts

12 gallons is equal to how many quarts

12 Ć 4 = 48 quarts.

Question 5.

The large airplane carried 5 tons of luggage this week. The medium airplane carried 3 tons of luggage this week. The small airplane carried 1,544 pounds of luggage this week. How many total pounds of luggage did all 3 planes carry this week?

All three planes carried a total of _____________ pounds of luggage this week.

Answer:

Total pounds of luggage all 3 planes carry this week is 17544 pounds.

Explanation:

Given,

The large airplane carried 5 tons of luggage this week.

The medium airplane carried 3 tons of luggage this week.

The small airplane carried 1,544 pounds of luggage this week.

To find: How many total pounds of luggage did all 3 planes carry this week?

We know 1 ton = 2000 pounds

5 tons = 5 Ć 2000

= 10000 pounds

3 tons = 3 Ć 2000

= 6000 pounds

Total pounds of luggage all 3 planes carry this week is 10000 + 6000 + 1544

= 17544 pounds.