Question

Part A Write the multiplication expression shown by the model. Do not solve the problem.

Answer 1

The area can be found out by multiplying the length and the breadth and also by adding the boxes.

Mathematically,

(4+5+4+7)× 10

or

L×B =  r + g + w + b

or

L×B =  3r + w

therefore

L×B is a multiplication expression.

Total number of boxes along the length = L= 20= 4+5+4+7

Total number of boxes along the breadth= B= 10

Total area or total number of boxes = L×B= 20×10=200

Total number of boxes= N= 200

Number of red boxes = r = 46

Number of green boxes = g = 46

Number of blue boxes = b = 46

Number of white boxes= w= 62

Mathematically,

N= r+ g + w + b

but r = g = b

therefore

N= 3r + w

N= r + g + w + b

L×B= N

or

L×B =  r + g + w + b

L×B =  3r + w

A multiplication expression is one which has variables or numbers being multiplied.

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