Question

The missing values A and B in the given calculation are .

• A. A = 42
  B = 0.5
• B. A = 40
  B = 0.5
• C. A = 42
  B = 0.25
• D. A = 40
  B = 0.25

Answer 1

The correct option is B A = 40

B = 0.5
We have to divide 142 by 4.

The number 142 can be split as:
142 = 100 + 40 + 2

Hence, the given calculation can be completed as:


Comparing this to the given calculation, we get:


∴ A = 40 and B = 2 $÷$ 4

Calculating 2 $÷$ 4 using the grid model, we get:


Comparing this to the given calculation, we find:


Hence, the missing values of A and B in the given calculation are:
A = 40 and B = 0.5