Lesson Plan-Grade 7
Lesson Title: Scientific notation
State standard:
MA.8.A.6.1 - Use exponents and
scientific notation to write large and small numbers and vice versa and to
solve problems
Grade: 7(FCAT)
Subject: Mathematics
Teaching Aids: Power Point slides
Objectives:
1) Students will express very small
numbers in Scientific Notation.
2) Students will express very large
numbers in Scientific Notation.
3) Binary Operations
on the numbers expressed in the form of
Scientific Notation
Lesson Procedure and
Evaluation:
Recapitulation: (10 minutes): The student needs to recognize the
base and the exponent of the numbers expressed in exponential form. The student
should also be able to know about the Laws of Indices.
Explanation (40 mins)
Activity 1: Expressing very small (including Decimal numbers) numbers
in Scientific
Notation.
Ex: 0.00032 = 3.2 X 10-4
Activity 2: Expressing very large numbers in Scientific Notation.
Ex: 560000000 = 5.6 X 107
Activity 3: Addition of numbers expressed in Scientific Notation.
Ex: 5.2 X 103 + 2.5 X 103 = 103 (5.2 + 2.5) = 7.7 X
103
Activity 4: Subtraction of numbers expressed in Scientific Notation
Ex:
13.1 X 105 – 3.6 X 105 =
105 (13.1 – 3.6) = 9.5 X 103
Activity 5: Multiplication of numbers expressed in Scientific Notation
Ex:
7.5 X 103 X 2.5 X 106 = (7.5
X 2.5) 103+6 = 18.75 X 109
= 1.875 X 1010
Activity 6: Division of numbers expressed in Scientific Notation
Ex:
7.5 X 109 / 2.5 X 104 = (7.5
/ 2.5) 109-4 = 3 X 105
Recapitulation and Evaluation: (10 mins)
1. Express 0.0012 in Scientific Notation.
2.
Express 150000000 in Scientific Notation.
3. Add: 8.9 X 105 + 7.3 X 105
4. Subtraction: 19.22 X 103
– 12.19X 103
5. Multiply: 5.8 X 106 X 3.9X
105
6. Divide: 3.6 X 108 / 1.2 X
103
