Question

Select the correct division expression for the grid model given below.


100 block = 1 grid
10 block = 0.1 grid
1 block = 0.01 grid

• A. 0.4 ÷ 3
• B. 3 ÷ 1.2
• C. 1.2 ÷ 3
• D. 3 ÷ 1.2

Answer 1

The correct option is C 1.2 ÷ 3

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


100 blocks make one whole grid.
Hence, each block represents one-hundredth of the whole grid.

One block = 0.01
Ten blocks = 0.01 × 10 = 0.1
Hundred blocks = 0.01 × 100 = 1

The visual A has 120 colored blocks.
Visual A (2 grids) = 120 blocks = 0.01 × 120 = 1.20 = 1.2
The visual B has 40 colored blocks in each of the three grids.
Visual B (3 grids) = 0.01 × 40 × 3 = 1.20 = 1.2
Each grid has 40 blocks, which means each grid represents the decimal 40 × 0.01 = 0.40 = 0.4
For this, 120 blocks are equally divided into 3 grids. So, the divisor is 3.
Dividend = Number of blocks = 1.2
Divisor = Total number of grids with an equal number of colored blocks = 3
Dividend ÷ Divisor = 1.2 ÷ 3
Hence, option C is correct.