1. Math & Exponents

2. Correct the following:
20.7 x 103
2.07 x 104

3. Correct the following:
400.9 x 104
4.009 x 106

4. Correct the following:
0.424 x 107
4.24 x 106

5. Correct the following:
x 107
4.24 x 105

6. Correct the following:
55.7 x 10-4
5.57 x 10-3

7. Correct the following:
0.045 x 10-9
4.5 x 10-11

8. 2 x 102 + 5 x 102 = 7 x 102 Adding & Subtracting Exponents 200 500 700
The exponents must be the same, if not,
convert the quantities so they have same exponent.
Add/Subtract the quantities x 10n
Let’s check
200
500
2 x x 102 =
7 x 102
700

9. Adding & Subtracting Exponents
The exponents must be the same, if not,
convert the quantities so they have same exponent.
Add/Subtract the quantities x 10n
Let’s check 40 +
300 =
340
4 x x 102 =
0.4 x 102
+ 3 x 102 =
3.4 x 102
340 =

10. (1)
2.7 x x 104 =

11. (2)
7.7 x x 104 =

12. (3)
6.3 x x =

13. Multiplying and Dividing Using Scientific Notation:
Exponents do not need to be the same.
Multiplication:
Multiply the numbers and then add the exponents.
Division:
Divide the numbers and subtract the exponents.

14. Examples:
4 x X 6 x =

15. Examples:
8 x ÷ 3 x =

16. (4)
3.5 x X 8.1 x 103 =

17. (5)
4.92 x ÷ 3.1 x =

18. (6)
6.7 x X 3.3 x =

19. (7)
8.77 x ÷ x 104 =