Multiplying by 10

Multiplying by 10

1. Mental MathMental Math
Multiply by 10Multiply by 10

2. Multiplying by Powers of 10
Move the decimal point to the right
0
1
2
3
10 1
10 10
10 100
10 1000
=
=
=
=
|
|
0
0
1
1
2
2
3
3
3 10 3. 1 3.
3 10 3. 10 30.
3 10 3. 100 300.
3 10 3. 1000 3000.
´ = ´ =
´ = ´ =
´ = ´ =
´ = ´ =
EF
E5F

3. 0
1
2
3
10 1
10 10
10 100
10 1000
=
=
=
=
|
|
0 3 3
100 100
0
1 3 3
100 10
1
2 3
100
2
3 3
100
3
.03 10 1 .03 .03
.03 10 10 0.30 0.3
.03 10 100 03.0 3
.03 10 1000 3 10 030. 30
´ = ´= = =
´ = ´ = = =
´ = ´ = =
´ = ´ =´ = =
EF
E5F
Multiplying by Powers of 10
Move the decimal point to the right

4. Work it out!
5
2
6
12 10000
.0012 10
23.781 10
.123 10
120000
120
237.81
1
10
2.3
1,000,000
´ =
´ =
´ =
´ =
=

5. Work it out!
5
2
6
12 10000
.0012 10
23.781 10
.123 10
12000
120
237.81
1
10
2.
0
3
1,000,000
´ =
´ =
´ =
´ =
=

6. Work it out!
5
2
6
12 10000 120000
.0012 10
23.781 10
.123 10
237.81
1
1
2.3
1,0000 ,
120
000
´ =
´ =
´ =
´ =
=

7. Work it out!
5
2
6
12 10000 120000
.0012 10 120
23.781 10
.123 1012.3
1,000,0
237.81
10 00
´ =
´ =
´ =
´ =
=

8. Work it out!
5
2
6
12 10000 120000
.0012 10 120
23.781 10 237.81
.123 1
1,000,0
10
1
2.3
0 00
´ =
´ =
´ =
´ =
=

9. Work it out!
5
2
6
12 10000 120000
.0012 10 120
23.781 10 237.81
.123 10 12.
1,000, 0
3
10 00
´ =
´ =
´ =
´ =
=

10. Work it out!
5
2
6
12 10000 120000
.0012 10 120
23.781 10 237.81
.123 10 12.3
10 1,000,000
´ =
´ =
´ =
´ =
=