Question

Multiply the following numbers and determine the product.
0.8 × 0.9 = ________

• A. 0.72
• B. 1.84
• C. 0.84
• D. 0.74

Answer 1

The correct option is A 0.72

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

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 0.9 is represented by 90 blocks.
0.8 × 0.9 is represented by the common area.
Total blocks in the common area = 72
So, 0.8 × 0.9 = 72 units of 0.01 = 0.72
Hence, option A is correct.