YFTCGFHFT

1. Answer the
following
questions:

2. In 2.317, which
digit is in the
tenths place?

3. 3

4. What is the standard
form for
three hundred
seventeen
thousandths?

5. 0.317

6. A centimeter is one
hundredth of a meter.
Write this in standard
form.

7. 0.01

8. Which digit in
1.08763 is in the
thousandths
place?

9. 7

10. What is the value
of 7 in 8.007?

11. 0.007

12. Objectives:
Add and subtract
decimal numbers
through thousandths
without and with
regrouping

13. The milkman rode 0.22
kilometers to make his
first delivery of milk and
0.04 kilometers to make
the second delivery.
How far did he travel in
delivering milk?

14. 22 out of 100 blocks are shaded, which is
equivalent to 0.22.

15. 4 out of 100 blocks are shaded, which is
equivalent to 0.04.

16. + =
22 out of 100
blocks are
shaded, which
is equivalent to
0.22.
4 out of 100
blocks are
shaded, which
is equivalent to
0.04.
Combining the
number of
shaded blocks
will give us 26 out
of 100 blocks,
which is
equivalent to
0.26.

17. Steps in adding decimals:
1. To add the decimals, align
the decimal points in a
straight column.
2. Add as in whole numbers.
3. Align the decimal point in
the sum with the decimal
points in the addends..

18. 4. If the sum of the digits is 10
or more, regroup the
decimal.
5. Use the decimal point to
separate the whole
number from the decimal
number in the sum

19. Addition of decimals
without regrouping:
Find the sum of
0.235 and 0.4

20. Addition of decimals
with regrouping:
Add
0.67 and 0.42

21. Alternative Solution:
67 out of 100
blocks are shaded,
which is equivalent
to 0.67.
42 out of 100
blocks are
shaded, which is
equivalent to 0.42.
Combining the
number of shaded
blocks will give us
100 out of 100
blocks and 9 more
that overlapped.
+ =

23. Thus, we have 1 whole block and 9
out of 100. Combining them ,
or 1.09

24. Steps in subtracting
decimals:
1. To subtract decimals,
align first the decimal
point , just as addition.
2. Regroup the decimals if
necessary.

25. Subtraction of decimals
without regrouping:
Subtract
0.864 and 0.23

26. Subtraction of decimals
with regrouping:
Find the
difference of
0.6 and 0.25

27. Perform as indicated:
a. 0.8 b. 0.75
+ 0.56 + 0.9
0.725 0.238
c. 0.6 d. 0.8
- 0.15 0.243

28. EVALUATION

29. A. Write in column form and add.
1. 0.48 + 0.009 + 0.23
2. 0.01 + 0.947 + 0.022
3. 0.008 + 0.62 + 0.3
4. 0.09 + 0.87 + 0.006
5. 0.756 + 0.843 + 0.95

30. B. Write in column form and subtract.
6. 9.2 – 2.6
7. 7.52 – 2.84
8. 4.08 – 2.79
9. 8.43 – 7.85
10. 42.05 – 25.38

31. Assignment:
Answer p. 110
numbers 16-20