Decimal fractions
Place value practice with tenths
We are learning to use tenths
Example: Fill in your worksheet as shown
Example: 345.6
Expanded number: 300 + 40 + 5 + 6/10
Exercise 1
What to do
Fill in your worksheet
Then expand your number
1) 34.5 (2) 8.7 (3) 2.1
4) 18.9 (5) 23.8 (6) 1.6
7) 0.5 (8) 0.2 (9) 3.9
10) 15.2 (11) 15 (12) 674
13) 1023 (14) 1045.6 (15) 300.1
16) 89.4 (17) 0.9 (18) 0.3
19) 104.3 (20) 100.5
Question
|
1000
|
100
|
10
|
1
|
|
Expanded number
|
1.
|
|
|
3
|
4
|
5/10
|
30 + 4 + ⅕ = 34.2
|
2
|
|
|
|
8
|
7/10
|
8 + 1/7 = 8.14285714
|
3
|
|
|
|
2
|
1/10
|
2 + 1/1 = 3
|
4
|
|
|
1
|
8
|
9/10
|
10 + 8 + 1/9 = 18.1111111
|
5
|
|
|
2
|
3
|
8/10
|
20 + 3 + ⅛ = 23.12500
|
6
|
|
|
|
1
|
6/10
|
1 + ⅙ = 1.166
|
7
|
|
|
|
0
|
5/10
|
0 + ⅕ = 0.2
|
8
|
|
|
|
0
|
2/10
|
0 + ½ = 0.5
|
9
|
|
|
|
3
|
9/10
|
3 + 1/9 = 3.11111111
|
10
|
|
|
1
|
5
|
2/10
|
10 + 5 + ½ = 15.3
|
11
|
|
|
1
|
5
|
0
|
10 + 5 + 1/0 = 15
|
12
|
|
6
|
7
|
4
|
0
|
600 + 70 + 4 + 1/0 = 674
|
13
|
1
|
0
|
2
|
3
|
0
|
1000 + 000 + 20 + 3 + 1/0 = 1023
|
14
|
1
|
0
|
4
|
5
|
6/10
|
1000 + 000 + 40 + 5 + ⅙ = 1045.16667
|
15
|
|
3
|
0
|
0
|
1/10
|
300 + 00 + 0 + 1/0 = 300
|
16
|
|
|
8
|
9
|
4/10
|
80 + 9 +¼ = 89.25
|
17
|
|
|
|
0
|
9/10
|
0 + 1/9 = 0.11111111
|
18
|
|
0
|
3
|
1
|
9/10
|
000 + 30 + 1 + 1/9 = 31.1111111
|
19
|
|
1
|
0
|
4
|
3/10
|
100 + 00 + 4 + ⅓ = 104.333333
|
20
|
|
1
|
0
|
0
|
5/10
|
100 + 00 + 0 + ⅕ = 100.2
|
Exercise 2
What to do:
Write the expanded numbers as a decimal fraction
Question
|
100
|
10
|
1
|
1/10
|
Decimal fraction
|
A
|
4
|
|
3
|
|
403
|
B
|
|
8
|
9
|
|
89
|
C
|
2
|
3
|
4
|
6
|
234.6
|
D
|
3
|
|
6
|
|
306
|
E
|
|
|
|
|
|
F
|
|
7
|
|
1
|
7.1
|
G
|
6
|
|
|
|
600
|
H
|
|
|
3
|
8
|
3.8
|
I
|
8
|
2
|
4
|
5
|
824.5
|
J
|
3
|
|
1
|
|
301
|
K
|
2
|
3
|
5
|
9
|
235.9
|
Exercise 3
Underline the tenths in each question
1) 34.6 (2) 78 (3) 345.9
4) 1234.6 (5) 67.9 (6) 0.012
7) 59.345 (8) 12345.8 (9) 456.67
10) 12.89 (11) 0.897 (12) 21.21
Exercise 4
Highlight the digit in the tens place
1) 24 741 (2) 18 932 (3) 78.043
4) 567.15 (5) 4536. 407
Exercise 5
Add one tenth (
) to each of these numbers
1) 0.7 + 0.1 = 0.8 (2) 0.3 + 0.1 = 0.4 (3) 12.0 + 0.1 = 12.1
4) 24.4 + 0.1 = 24.5 (5) 12.6 + 0.1 = 12.7 (6) 168.4 + 0.1 = 168.5
7) 2145.2 + 0.1 = 2145.2 (8) 0.9 + 0.1 = 1.0 (9) 23.9 + 0.1 = 24.0
Exercise 6
Take one tenth (
) from each of these numbers
1) 39.6 - 0.1 = 39.5 (2) 32.1 - 0.1 = 31.0 (3) 123.7 - 0.1 = 123.6
4) 0.89 - 0.1 = 0.88 (5) 45.6 - 0.1 = 45.5 (6) 56.1 - 0.1 = 55.0
7) 286. 2 - 0.1 = 286.1 (8) 39.1 - 0.1 = 38.0 (9) 8.2 - 0.1 = 8.1
10) 478.30 - 0.1 = 478.29
WALT - We are learning identify and use tenths.
Today I have just finished my maths activity for week 5 term 2. What we have been learning about was add decimals. I hope you enjoy my maths work.
This morning we have to write a blog post about what BEDMAS is and what it stands for? So through out this term we have been learning maths, in maths we have been learning about new statements about maths. Our teacher Mr Wiseman told us that we were going to be learning about difference type of maths we were going to be learning, he told the whole maths class that we are learning about a type of maths called BEDMAS. BEDMAS was a type of maths everyone was confused about, everybody didn't know what it meant, so our teacher started to explain it to us.
