1. The arrow points to the smaller of the two numbers
Year 7 mathematics: Decimals May-18
Decimals
0.4
0.04
0.80
0.8
0.17
0.6
0.801
0.9
0.50
0.056
0.900
0.300
0.42
0.042
0.7
0.620
0.002
0.2
0.64
Place one of the following symbols, <, =, > to make each statement true
The arrow points to the smaller of the two numbers

2. Multiplying and dividing by powers of 10
Year 7 mathematics: Decimals May-18
Multiplying and dividing by powers of 10
The powers of 10 are numbers such as 10, 100, 1000 etc.
When multiplying move the decimal point to the right.
When dividing move the decimal point to the left.
You move the decimal point by the number of zeros.
Place zeros on the end or beginning when needed.
a) x 100 =
B) x =
C) ÷ 100 =
D) ÷ 10 =

3. Multiplying and dividing by powers of 10
Year 7 mathematics: Decimals May-18
Multiplying and dividing by powers of 10
The powers of 10 are numbers such as 10, 100, 1000 etc.
When multiplying move the decimal point to the right.
When dividing move the decimal point to the left.
You move the decimal point by the number of zeros.
Place zeros on the end or beginning when needed.
a) x 100 =
81592
B) x =
81592
C) 0 02 ÷ 100 =
0 0002
D) 0 02 X = 20

4. Example 1 Evaluate the following.
Year 7 mathematics: Decimals May-18
Example 1
Evaluate the following.
a) 3·78 × 10 b) 9·2 × 100 c) 0·62 × 1000 d) 4·305 × 10000
a) 3·78 × 10 =
37·8
b) 9·2 × 100 =
920
c) 0·62 × 1000 =
620
d) 4·305 × =
43 050
Evaluate the following.
e) 6·42 ÷ 10 f) 5·7 ÷ 100 g) 0·06 ÷ 1000 h) 12·07 ÷ 10000
e) 6·42 ÷ 10 =
0·642
f) 5·7 ÷ 100 =
0·057
g) 0·06 ÷ 1000 =
0·000 06
h) ·07 ÷ = 0·

5. Today’s work Ex 7-06 Page 229 All Qs 1st column only Yesterday’s work
Year 7 mathematics: Decimals May-18
Today’s work
Ex 7-06
Page 229
All Qs 1st column only
Yesterday’s work
Ex 7-05
All Qs a, c, e…