Question

Mrs.Williams is knitting a blanket for her newborn granddaughter.The blanket is 2.25 meters long and 1.8 meters wide. What is the area the blanket? Write the answer in centimeters.

Answer 1

Area = Length  x  Width
L = 2.25 m = 225 cm
W = 1.8 m = 180 cm
A = 225 * 180 = 40,500 cm²
Answer: Area of the blanket is 40,500 cm².

Answer 2

The blanket area is 40,500 cm²

Further explanation

The blanket measurement is

length = 2.25 m

width = 1.8

AREA = length x width

          =  $\boxed {2.25 \times1.8 }$

To multiply the decimal numbers, we are going to multiply them as the whole numbers

2.25           ⇒ 2 decimal place

   1.8  x      ⇒  1 decimal place

1800

225    +

4.050          ⇒ 3 decimal place

So, we get the area of the blanket is 4.050 m². The next step is to convert the unit from meter square to centimetres square

$\boxed {1 m = 100 cm\ }$

$\boxed {(1m)^{2} = 100^{2} cm}$

so

$=\boxed {4.050 \times100^{2}\ }\\ =\boxed {40500\ }$

The blanket's area is 40500 cm²

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Keywords: multiplication, standard algorithm, area model,decimal number multiplication, additional, unit conversion