teaching slides on decimals (P4/ Grade 4-5)

1. Decimals (1)
UNDERSTANDING
HUNDREDTHS

2. If this is 1 whole…
Can you show a
piece that is
one-tenth of
this square
block?

3. If this is 1 whole, one-tenth is
1
= 0.1
10

4. If this is 1 whole…
Can you show
two-tenths of
this square?

5. 1 whole two-tenths
2
= 0.2
10

6. If this is 1 whole…
Can you show
three-tenths of
this square?

7. 1 whole three-tenths
3
= 0.3
10

8. If this is 1 whole…
Can you show
ten-tenths of
this square?

9. 1 whole ten-tenths
10
=1
10

10. I have 5 strips here.
What part of
the square are
they?
5
= 0.5
10

11. Look for the smallest piece..
Can you tell
what part of
the square this
small piece is?
How many of
this piece fit
into the large
square?

12. Look for the smallest piece..
This is one out
of one
hundred. What
is the fraction
of 1 part?
1_
= 1 hundredth
100

13. In decimal form…
1
= 1 hundredth
100
= 0.01

14. Hundredths…
Can you show
2
100
2
= 2 hundredths
100
= 0.02

15. Hundredths…
Can you show
3
100
3
= 3 hundredths
100
= 0.03

16. Mini Quiz!!
What is the decimal for:
4 7 6
= 0.04 = 0.07 = 0.06
100 100 100
5 hundredths = 0.05
8 hundredths = 0.08
9 hundredths = 0.09

17. What comes after 9 hundredths?
10 hundredths = 0.10

18. Which is bigger?
0.10 ? OR?
0.1 ?
Lets find
out!

19. Can you show me…
10 smallest pieces
10
= 10 hundredths
100
= 0.10
Can you find a single piece that is the
same size as the ten pieces?
What do
you call
this?

20. 10 1
=
100 10
10 hundredths = 1 tenth
0.10 = 0.1

21. Show me…
1 whole 1 tenth 1 hundredth
1 1
1 10 100
1 0.1 0.01

22. Line 10 hundredths in one line
0.01
0.02 0.04 0.06 0.08
0.01 0.03 0.05 0.07 0.09
0 0.1

23. Show me the..
Ones Tenths Hundredths

24. Show me the..
Ones Tenths Hundredths
1 1 1

25. Show me 2 tenths and 5 hundredths

26. 2 tenths and 5 hundredths
How do you write as a decimal?
Ones Tenths Hundredths
0 2 5

27. Can you show 15
me : 100
Remember?
10 hundredths = 1 tenth
15 hundredths
1 tenth 5 hundredths
15 = 1 tenth 5 hundredths
100 = 0.15

28. Can you show
53 hundredths
me :
10 hundredths = 1 tenth
53 hundredths
5 tenths 3 hundredths
53 hundredths = 5 tenths 3 hundredths
= 0.53

29. Can you show 124
me : 100
How many
How many hundredths
smallest make a 1
pieces make whole?
a square?

30. Can you show 124
me : 100
124 hundredths
1 one 4 hundredths
2 tenths
124 hundredths = 1 one 2 tenths 4 hundredths
= 1.24