What is 0.4 divided by 0.008?

1 Answer
Mar 16, 2016

Answer:

#0.4-:0.008= 50#

Explanation:

Given:#" "0.4-:0.008#

Write as #" "color(blue)(0.4/0.008)#

'~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
To get rid of the decimals multiply by 1 but in the form of

#" "1=color(brown)(1000/1000)# giving
'~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~

#" "color(blue)((0.4color(brown)(xx1000))/(0.008color(brown)(xx1000)))color(green)( = 400/8)#

Lets split (partition) the number to make it easier to work out in our heads

400 can be slit (partitioned) into #10xx40#

So we can rewrite #color(green)(400/8)# as

# " "color(green)( 10 xx 40/8)#

But #5xx8 =40" that is: "40-:8=5# so we end up with

#" " color(blue)(color(green)(10 xx5) = 50)#