Grade 5 Math Practice Test: Multiplying Decimals

4 × 3 = 12, and tenths times tenths gives hundredths, so the product is 0.12. 0.7 comes from adding instead of multiplying.

2 × 6 = 12 and 0.5 × 6 = 3, so 2.5 × 6 = 15. An estimate of about 3 × 6 = 18 shows that 1.5 and 150 are far off.

12 × 34 = 408. Each factor has one decimal place, so the product has two: 4.08. 4.6 is the sum of the two numbers, not the product.

$1.85 × 3 = $5.55 ($3.00 + $2.55). $4.85 comes from adding 3 instead of multiplying by 3.

25 × 8 = 200, and the factors have three decimal places in all, so the product is 0.200 = 0.2. 1.05 is the sum, not the product.

Area = length × width = 4.5 × 2.2 = 9.9 square meters. 13.4 is the perimeter, and 6.7 is just the sum of the two sides.

Multiplying by a number less than 1 makes the product smaller than 7, and 0.9 is less than 1. 7 × 1 equals 7, which is not less than 7.

5 hundredths × 6 = 30 hundredths, which is 0.30 = 0.3. 0.03 puts the decimal point one place too far left.

Each factor has one decimal place, so the product has two: 3.91. The estimate 2 × 2 = 4 agrees.

1.6 × 5 = 8.0, so she walks 8 kilometers. 6.6 comes from adding 5 instead of multiplying.