Math CIA 6 Final

1. 1. Emma is solving a math problem. She needs to find the number that is 10 times 0.9. What is the correct answer?

• a. 9

• b. 90

• c. 0.9

• d. 0.09

Answer explanation

To find 10 times 0.9, multiply:

10×0.9= 0.9

When you multiply a number by 10, you shift the decimal one place to the right. Since 0.9 has one decimal place, moving it one place to the right gives 9.0, which is simply 9

Tags

CCSS.5.NBT.A.2

2) What is the expanded form of 0.528?

• a. 5+20+800

• b. b. 5(1)+2(10)+8(100)

• c. (5 × 1/10) + (2 × 1/100) + (8 × 1/1000)

• d. 5 × 1 + 2 × 1/10 + 8 x 1/100

Answer explanation

• The 5 is in the tenths place: 5 x 1/10

• The 2 is in the hundredths place: 2 x 1/100

• The 8 is in the thousandths place: 8 x 1/1000

5 × 1/10 + 2 × 1/100 + 8 × 1/1000

Tags

CCSS.5.NBT.A.3A

3) Which of the following is the decimal form of the fraction 42/100?

• a. 42

• b. 4.2

• c. 0.42

• d. 0.042

Answer explanation

To convert a fraction to a decimal, divide the numerator by the denominator:

42÷100=0.42

Since 42 is being divided by 100, we move the decimal point two places to the left, giving us 0.42.

Tags

CCSS.4.NF.C.6

4) Which statement is true?

• a. 0.854 > 0.845

• b. 0.312 < 0.132

• c. 0.6 < 0.06

• d. 0.75 = 0.705

Answer explanation

Compare 0.854 and 0.845 digit by digit:

• Tenths: Both have 8 → move to hundredths.

• Hundredths: 5 vs. 4 → 5 is greater than 4, so 0.854 > 0.845.

Tags

CCSS.4.NF.C.7

5) Choose the answer that best represents the expression below:

(2×10) + (5×1) + (8× 1/10) + (3 x 1/100) + (7 x 1/1000)

• a. 25.837

• b. 25.073

• c. (2 × 10) + (5 × 1) + (8 × 10/1000) + (3 × 1/100)

• d. (25 × 10) + (8 × 1/100) + (3 × 1/5)

Answer explanation

Breaking it down:

• 2 × 10 = 20

• 5 × 1 = 55

• 8 × 1/10 = 0.88

• 3 × 1/100 = 0.033

• 7 × 1/1000= 0.0077

Adding everything together:

20 + 5 + 0.8 + 0.03 + 0.007 = 25.837+ 5 + 0.8 + 0.03 + 0.007 = 25.837

Tags

CCSS.5.NBT.A.3A

6) Which of the following shows the number five thousand, seven hundred eighty and three hundred sixty-two thousandths?

• a. 5,608.362

• b. 5,608.0362

• c. 5,780.362

• d. 5,708.0362

Tags

CCSS.5.NBT.A.3A

7) Where would 0.63 fall on the number line?

• a. Before 0.3

• b. Between 0.4 and 0.5

• c. Between 0.6 and 0.7

• d. After 0.7

Answer explanation

• 0.43 is greater than 0.4 and less than 0.5, so it falls between 0.4 and 0.5 on the number line.

• a. Before 0.3 is incorrect since 0.43 is greater than 0.3.

• c. Between 0.5 and 0.6 is incorrect since 0.43 is less than 0.5.

• d. After 0.7 is incorrect because 0.43 is less than 0.7.

Tags

CCSS.5.NBT.A.3B

8) How is the digit 2 in 12.64 related to the 2 in the number 28.47?

• a. The 2 in 12.64 is 10 times greater than the 2 in 28.47.

• b. The 2 in 12.64 is 100 times greater than the 2 in 28.47.

• c. The 2 in 12.64 is the same value as the 2 in 28.47.

• d. The 2 in 12.64 is 1/10 times smaller than the 2 in 28.47.

Answer explanation

• The 4 in 12.64 is in the tenths place, representing 0.4.

• The 4 in 28.47 is in the hundredths place, representing 0.04.

Tags

CCSS.5.NBT.A.1

The cost of a roundtrip airline ticket from Atlanta, GA to Los Angeles, CA, is $520.75. About how much will the tickets cost for a family of two?

• a. $260

• b. $521

• c. $1,042

• d. $2,100

Answer explanation

To calculate the cost for a family of two, multiply the cost of one roundtrip ticket by 2:
$520.75 × 2 = $1,041.50

Tags

CCSS.5.NBT.B.7

To determine which players' batting averages round to 0.28, we need to round each player's batting average to the nearest hundredth:

Prado: 0.286
Bourne: 0.291
Freeman: 0.276
Heyward: 0.271
Uggla: 0.282
McCann: 0.273

Which two players' batting averages round to 0.28? (PICK TWO)

• a. Freeman

• b. Heyward

• c. Uggla

• d. McCann

Tags

CCSS.5.NBT.A.4