How do you subtract decimals using a hundredths chart?
Here is how to use a
hundredths chart to subtract 0.86 - 0.23
Step 1
Shade 86 squares
(8 columns of 10 squares, plus 6 more)
to show 0.86
Step 2
Using a black
crayon,
cross out 23 squares from the shaded squares to show 0.23.
Step 3
Count the squares that are shaded in
your hundredths chart,
but not the ones that are crossed
out.
How many hundredths are shaded?
Write the decimal for the total number of hundredths squares
shaded.
Answer
0.86 - 0.23 =
0.63
Example
Subtract 1.54 - 0.74
Step 1
Shade 1 grid and
54 squares on another grid
to show 1.54.
Step 2
Using a black
crayon,
cross out 74 squares from the shaded squares to show
0.74.
Step 3
Count the squares that are shaded in
your hundredths chart,
but not the ones that are crossed
out.
How many hundredths are shaded?
Write the decimal for the total number of hundredths squares
shaded.
