Elem_Math_5

2. A. Give the product:
1. 0.5
x 5
2.5
2. 0.9
x 7
6.3
3. 1.12
x 3
3.36
4. 1.30
x 6
7.80
5. 1.10
x 4
4.40
6. 3.10
x 4
12.40

3. How do we multiply a mixed
decimals with hundredths by a
whole number?
 - to multiply a mixed decimal with
hundredths by a whole number,
multiply as we multiply whole
numbers.

4.  - Count the decimal places in the
factors.
- The number of decimal places in
the factors should be the same in the
product.

6. Some boys go on biking trip to
strengthen their muscles. If they
go at the rate of 2.15 kilometers
per hour, how far have they gone
in 4.15 hours?

7. What is asked in the problem?
How far have they gone in 4.15
kilometers, if they go at the rate of
2.15 kilometers per hour.

8. What are given in the problem?
2.15 kilometers
and
4.15 hours

9. What operation is needed in
solving the problem?
The operation
needed to solve
the problem is
multiplication.

10. What is the number sentence?
The number sentence is
2.15 x 4.15 = N

11. 4.15
x 2.15
5
7
0
2
2

12. 4.15
x 2.15
5
7
0
2
5
1
4

13. 4.15
x 2.15
5
7
0
2
5
1
4
0
3
8
1
+
5
2
2
9
8
1
2 decimal places
2 decimal places
4 decimal places

14. 4.15
x 2.15
5
7
0
2
5
1
4
0
3
8
1
+
5
2
2
9
8
1
2 decimal places
2 decimal places
4 decimal places
.

15. 2.14
x 1.3
2
4
6
1

16. 2.14
x 1.3
2
4
6
4
1
2

17. 2.14
x 1.3
2
4
6
4
1
2
1
2
8
7
2
2 decimal places
1 decimal place
3 decimal places

18. 2.14
x 1.3
2
4
6
4
1
2
1
2
8
7
2
2 decimal places
1 decimal places
3 decimal places
.

19. How do we multiply a mixed
decimals by another mixed
decimal?
To multiply mixed decimals by
another mixed decimals:
1. Multiply mixed decimals as we
multiply whole numbers.
2. Count the decimal places in the
factors.

20. 3. The number of decimal places
in the factors is the same to the
number of decimal places in the
product.

21. Find the product. Get the message:
1. 7.02
x 2.5
3. 1.23
x 4.1
2. 35.8
x 2.3
4. 2.05
x 1.12
A = 10.675
L = 5.043
E = 17.550
D = 8.338
O = 2.296
S = 1.183
V = 82.34

22. Find the product:
1. 3.52
x 2.13
2. 4.26
x 4.12
3. 26.05
x 5.17
4. 2.13
x 1.45
5. 9.22
x 3.34

23. Multiply the following:
1. 32.6
x 9.8
2. 7.34
x 3.56
3. 8.63
x 4.32
4. 9.78
x 1.87
5. 6.94
x 3.75

24. Thank you!!!