Question

Multiply the following numbers and determine the product.


0.8 × 0.5 = ________

• A. 0.13
• B. 0.4
• C. 1.3
• D. 4

Answer 1

The correct option is B 0.4

$\text{Detailed step-by-step solution:}$


100 blocks make one whole grid. Hence, each block represents one-hundredth of the whole grid.
One block = 0.01
Hundred blocks = 0.01 × 100 = 1
0.8 is represented by 80 blocks and 0.5 is represented by 50 blocks.
0.8 × 0.5 is represented by the common area.
Total blocks in the common area = 40
So, 0.8 × 0.5 = 40 units of 0.01 = 0.4
Hence, option A is correct.