Thursday 1 June 2017

Tenths

Decimal fractions

Place value practice with tenths

We are learning to use tenths

Example: Fill in your worksheet as shown

Example: 345.6

100
10
1
3
4
5
6

Expanded number: 300 + 40 + 5 + 6/10

Exercise 1


What to do
  1. Fill in your worksheet
  2. 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.