4. Decimal Grids + Fractions
This grid is a 10 x 10
grid which means it
has ____ squares
1 2 3 4 5 6 7 8 9 10
12345678910
If I shade in all of the squares I’ll have ______ shaded squares
If I shade in half of the squares I’ll have _______ shaded squares
One fully shaded square is equal to one whole
5. Decimal Grids + Fractions
1 2 3 4 5 6 7 8 9 10
12345678910
= 1
1 2 3 4 5 6 7 8 9 10
12345678910
= 0.5
Because all 100 squares are filled in Because half of the 100 squares are filled in
6. Decimal Grids + Fractions
1 2 3 4 5 6 7 8 9 10
12345678910
= 0.2
1 2 3 4 5 6 7 8 9 10
12345678910
= 0.7
Because 20 out of 100 squares are filled in Because 70 out of 100 squares are filled in
7. Decimal Grids + Fractions
1 2 3 4 5 6 7 8 9 10
12345678910
Now, lets model 0.8 on the grid
0.8 = 8/10
8/10 of 100 is 80
So, how many squares should I fill in?
8. Adding on Decimal Grids (To the tenths place)
1 2 3 4 5 6 7 8 9 10
12345678910
Let’s take it a step further…. Consider the following equation:
0.4 + 0.5 = ?
Let’s shade in 0.4 first…
Now, let’s add 0.5 (or 50 squares)
How many squares are filled in now?
What would that be as a decimal?
9. Adding on Decimal Grids (To the hundredths place)
1 2 3 4 5 6 7 8 9 10
12345678910
Let’s take it a step further…. Consider the following equation:
0.42 + 0.54 = ?
Let’s shade in 0.42 first…
Now, let’s add 0.54 (or 54 squares)
How many squares are filled in now?
What would that be as a decimal?
11. Subtracting on Decimal Grids (To the tenths
place)1 2 3 4 5 6 7 8 9 10
12345678910
Let’s take it a step further…. Consider the following equation:
0.5 - 0.4 = ?
Let’s shade in 0.5 first…
Now, take away 0.4 (or 40 squares)
How many squares are filled in now?
What would that be as a decimal?
13. Multiplying on Decimal Grids
(To the tenths place)
1 2 3 4 5 6 7 8 9 10
12345678910
Let’s try multiplying 0.4 x 0.3
Fill in 0.4 first (vertically)
Then fill in 0.3 (horizontally)
Now, find where they overlap
There are 12 squares covered which means our answer is…
0.12
