3.05 Multiplying with decimals
For each of the following products:
State the number of decimal places in the answer.
Calculate the answer.
0.3 \times 0.5
0.2 \times 0.54
0.1 \times 0.2 \times 0.3
0.1 \times 0.05
0.03 \times 0.05
0.003 \times 0.004
0.2 \times 0.5 \times 0.02
0.015 \times 0.2
4 \times 0.005
54 \times 0.001
12 \times 0.02
10.3 \times 0.01
Evaluate:
4 \times 5
4 \times 50
4 \times 0.5
0.4 \times 0.5
0.6 \times 0.3
2.2 \times 4
1.2 \times 3.2
4.23 \times 2
4.8 \times 8
62 \times 9.6
3.89 \times 7
2.8 \times 6.8
For the following products, state whether the answer will be:
- Greater than both numbers.
- Less than both numbers.
- In between the two numbers.
3 \times 5
3 \times 0.5
0.3 \times 0.5
7 \times 4
0.7 \times 4
0.7 \times 0.4
15 \times 8
15 \times 0.8
1.5 \times 0.8
Describe when the product of two numbers is:
In between the two numbers.
Less than both of the two numbers.
Find the area of a rectangle with the following dimensions:
Consider a rectangle with side lengths of 4.67 and 9 units.
Complete the table by finding the area of each smaller rectangle as a decimal.
Hence, find 4.67 \times 9 as a decimal.
| 4 | 0.6 | 0.07 | |
|---|---|---|---|
| 9 |
Consider a rectangle with side lengths of 46.2 and 6 units.
Complete the table by finding the area of each smaller rectangle as a decimal.
Hence, find 46.2 \times 6 as a decimal.
| 40 | 6 | 0.2 | |
|---|---|---|---|
| 6 |
Consider a rectangle with side lengths of 4.92 and 0.6 units.
Complete the table by finding the area of each smaller rectangle as a decimal.
Hence, find 4.92 \times 0.6 as a decimal.
| 4 | 0.9 | 0.02 | |
|---|---|---|---|
| 0.6 |
Consider a rectangle with side lengths of 2.3 and 3.1 units:
Complete the table by finding the area of each smaller rectangle as a decimal.
Hence, find 2.3 \times 3.1 as a decimal.
| 2 | 0.3 | |
|---|---|---|
| 3 | ||
| 0.1 |
Consider a rectangle with side lengths of 0.87 and 7.8 units.
Complete the table by finding the area of each smaller rectangle as a decimal.
Hence, find 0.87 \times 7.8 as a decimal.
| 0.8 | 0.07 | |
|---|---|---|
| 7 | ||
| 0.8 |
Use the area method to find 0.47 \times 0.89 as a decimal.
Use the area method to find 4.86 \times 0.86 as a decimal.
Evaluate:
Evaluate: