# DIVISION OF THE DECIMALS

LESSON PLANNING OF DIVISION OF THE DECIMALS

Subject Mathematics

Students` Learning Outcomes

• Divide decimals by 10, 100, and 1000.

Information for Teachers

• When multiplied any decimal number with 10, 100, or 1000, then decimal point moves right to the number.

• So, by multiplication, the value of the number is increased further.
• When any decimal number is divided by 10, 100, or 1000 then decimal point moves left to the number. So, the value of number will further decreased by division.
• To divide a decimal by 10, move the decimal point one place towards left.
• To divide a decimal by 100, move the decimal point two decimal places towards left.
• To divide a decimal by 1000, move the decimal point three decimal places towards left. • Use textbook when and where required.

Material / Resources

Writing board, chalk / marker, duster, textbook

Introduction

• Ask students to recall the steps of the multiplication of decimal.
• Once multiplication is practiced, use the same method to introduce division.
• Decimal point moves to left and number become smaller. o   What is the reverse process of addition? (Subtraction)

o   What is the reverse process of multiplication? (division)

o   In multiplication decimal moves to where? (right)

o   In division decimal moves to? (left)

o   In multiplication number become bigger, in division number becomes smaller!

Write on the board 500 and ask place value of 5? (Hundreds)

• Ask whether the number is increased or decreased? (Similarly talk about the change in place value)

Development

Activity 1

• Working in groups asks the students to write steps of dividing with 10, 100, or 1000.
• Groups will present their work and reason out.

Pair works:

• Calculate the following;

Sum up / Conclusion

• When you divide by 10, 100, or 1000 the decimal point moves to the left.
• Move the decimal point once for each zero you are dividing by.
• Close the session with few more examples;

Assessment

• Give some questions to solve e.g.
• 7.321 x 10, 3.421 x 100, 9, 633 x 1000

• Complete the following table:
• Use textbooks where and when required.