Math Boxes 5-4 and Activity Page 1.5

In problem 1, we decomposed ⅜ into unit fractions. Which of these shows ⅜ written as a sum of unit fractions?

• ⅛ + ⅛ + ⅛

• ⅛ + ⅜

• 1 + 1 + ⅛

• ½ + ⅛

Answer explanation

The correct choice is ⅛ + ⅛ + ⅛, which adds up to ⅜. Each ⅛ is a unit fraction, and three of them sum to the desired fraction. The other options do not represent ⅜ as a sum of unit fractions.

Tags

CCSS.4.NF.B.3

Looking at problem 2, regarding the milk truck, if the tank can hold 6,300 gallons and 948 gallons are picked up, how many more gallons can fit?

• 5,352 gallons

• 5,452 gallons

• 7,248 gallons

• 4,352 gallons

Answer explanation

To find how many more gallons can fit, subtract the amount picked up from the tank's capacity: 6300 - 948 = 5352. Thus, the correct answer is 5,352 gallons.

Tags

CCSS.4.MD.A.2

CCSS.4.NBT.B.4

CCSS.4.OA.A.3

In problem 3, regarding the school raffle, how might you use rounding to the nearest hundred to estimate the sum?

Tags

CCSS.4.NBT.A.3

CCSS.4.OA.A.3

If you needed to convert the remaining gallons from problem 2 to quarts, how would you perform this calculation? Hint: 1 gallon = 4 quarts.

• Multiply by 2.

• Multiply by 4.

• Divide by 4.

• Divide by 2.

Answer explanation

To convert gallons to quarts, you multiply by 4 since 1 gallon equals 4 quarts. Therefore, if you have a certain number of gallons, multiplying that number by 4 will give you the equivalent in quarts.

Tags

CCSS.4.MD.A.1

CCSS.4.MD.A.2

In problem 3, regarding the raffle money, how much MORE money was raised on Monday compared to Thursday?

• $141

• $253

• $123

• $81

Answer explanation

To find how much more money was raised on Monday compared to Thursday, subtract Thursday's total from Monday's total. The difference is $141, making this the correct answer.

Tags

CCSS.4.MD.A.2

CCSS.4.NBT.B.4

CCSS.4.OA.A.3

What did scientists discover when comparing rock layers between South America and Africa?

• The rock layers did not match at all.

• The rock layers along their coasts matched each other.

• Only the fossils matched, but not the rocks.

• The rocks were completely different colors.

Answer explanation

Scientists found that the rock layers along the coasts of South America and Africa matched, supporting the theory of continental drift. This similarity indicates a shared geological history between the two continents.

Tags

CCSS.RI.4.3

CCSS.RI.4.8

CCSS.RI.4.1

CCSS.RI.4.7

Which ancient creature's fossils were found in both southern Africa and India?

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Tags

CCSS.RI.4.1

CCSS.RI.4.3

Where was Alfred Wegener from?

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Tags

CCSS.RI.4.3

Besides rocks and fossils, what other matching deposits were found between eastern North America and southern Europe?

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Tags

CCSS.RI.4.7

What interesting discovery about Antarctica supported Wegener's theory?

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Tags

CCSS.RI.4.3