SBAC Math Grade 5 Fractions and Decimals 2

Question 1

What is 3/4 + 2/3?

Accepted Answer

17/12

Answer

To add fractions with unlike denominators, find the LCD (12), convert: 9/12 + 8/12 = 17/12.

Question 2

What is 0.6 × 0.4?

Accepted Answer

0.24

Answer

0.6 × 0.4: multiply 6 × 4 = 24, then place the decimal point 2 places from the right (one decimal place in each factor = two total), giving 0.24.

Question 3

What is 5/6 − 1/4?

Accepted Answer

7/12

Answer

LCD of 6 and 4 is 12. Convert: 10/12 − 3/12 = 7/12.

Question 4

Which decimal is equivalent to 3/8?

Accepted Answer

0.375

Answer

3/8 = 0.375. Divide 3 ÷ 8: 8 goes into 30 three times (0.3), remainder 6; 8 goes into 60 seven times (0.07), remainder 4; 8 goes into 40 five times (0.005). So 3/8 = 0.375.

Question 5

A recipe uses 2 1/2 cups of flour. If you want to make 3 batches, how many cups of flour do you need?

Accepted Answer

7 1/2 cups

Answer

2 1/2 × 3 = 5/2 × 3 = 15/2 = 7 1/2 cups. Convert the mixed number to an improper fraction before multiplying.

SBAC Practice Test

SBAC Practice Test

SBAC Math Grade 5 Fractions and Decimals 2