Question

2. Peter multiplied 0.65 by 0.39, how many decimal places were there in the

product?

A. 1 B. 2 C. 3 D. 4

3. If 0.9 x 0.45 = 0.405, what is 0.09 x 0.45 equal to?

A. 0.0045 B. 0.0405 C. 0.405 C. 4.005

4. What is the product of 0.5 and itself?

A. 0.025 B. 0.25 C. 1.0 D. 2.5

5. Multiply: 0.44 x 4

A. 0.76 B. 1.76 C. 2.76 D. 3.76

6. Which of the following expressions gives a product of 0.0006?

A. 0.2 x 0.3 B. 0.02 x 0.3 C. 0.2 x 0.03 D. 0.02 x 0.03

7. What will be the product if 0.4 is multiplied to 0.36?

A. 0.104 B. 0.124 C. 0.134 D. 0.144

8. Which of the following is correct?

A. 0.5 times 0.9 is 4.5.

B. The product of 0.2 x 0.2 x 0.2 is 0.008.

C. 0.1 x 0.1 is equal to 0.001.

D. The product of 0.2 and its next even decimal number is 0.6.

9. Which of the following decimals will make ____ x 7 = 4.2 correct?

A. 0.006 B. 0.06 C. 0.6 D. 1.6

10. A Science book is 0.8 cm thick. A Math book is twice as thick as the Science

book. How thick is the Math book?

A. 0.016 cm B. 0.016 cm C. 1.6 cm D. 3.6 cm​

Answer 1

Below

Explanation:

2. 4 decimal places.

3. 0.0405.

4. 0.25

5. 1.76

6. 002 x 0.03.

7. 0.144

8. B.

9. 4.2 / 7 = 0.6.

10. 1.6 cm.

Answer 2

Explanation:

In decimal multiplication,ignore the decimal points and multiply normally. The count the number of decimal places in the factors and move the decimal points of the whole number that number of times to the left.

2) 0.65 * 0.39= 0.2535

65 * 39 = 2535

0.65 -----> 2 decimal places and 0.39 -----> 2decimal places. so total = 4

0.2535

3) 0.09* 0.45 = 0.0405

4) 0.5 * 0.5 = 0.25

5) 0.44 *4 = 1.76