Which expression is equal to (3 x 5) x 4

3 x 5 = 15

15 x 4 = 60

(3*5)4 (distributive property) is the equivalent.

Or 15*4 = 60.  

The blanket area is 40,500 cm²

The blanket measurement is

length = 2.25 m

width = 1.8

AREA = length x width

          =  

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

so

The blanket's area is 40500 cm²

Standard algorithm model

Alfalfa eaten by horses in a number of days

Total money collected

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