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Standard: 7th Standard
Chapter: Multiplying decimal numbers by 0.1, 0.01 and 0.001.

Q1.

Multiplying decimal numbers by 0.1

Answer:

Multiplying Decimal by 0.1

Question:
Find the value of 12.3 × 0.1

Simple Trick

When we multiply a number by 0.1, the decimal point moves one place to the left.

Step 1: Write the Number

12.3

Step 2: Move the Decimal One Place to the Left

12.3 → 1.23

Final Answer:

12.3 × 0.1 = 1.23

Easy Rule:

  • ×0.1 → Move 1 place left
  • ×0.01 → Move 2 places left
  • ×0.001 → Move 3 places left
Q2.

Multiplying decimal numbers by 0.01

12.3 × 0.01

Answer:

Multiplying Decimal by 0.01

Question:
Find the value of 12.3 × 0.01

Simple Trick

When we multiply a number by 0.01, the decimal point moves two places to the left.

Step 1: Write the Number

12.3

Step 2: Move the Decimal Two Places to the Left

12.3 → 1.23 → 0.123

Final Answer:

12.3 × 0.01 = 0.123

Easy Rule:

  • ×0.1 → Move 1 place left
  • ×0.01 → Move 2 places left
  • ×0.001 → Move 3 places left
Q3.

Multiplying decimal numbers by 0.001

12.3 × 0.001

Answer:

Multiplying Decimal by 0.001

Question:
Find the value of 12.3 × 0.001

Simple Trick

When we multiply a number by 0.001, the decimal point moves three places to the left.

Step 1: Write the Number

12.3

Step 2: Move the Decimal Three Places to the Left

12.3 → 1.23 → 0.123 → 0.0123

Final Answer:

12.3 × 0.001 = 0.0123

Easy Rule:

  • ×0.1 → Move 1 place left
  • ×0.01 → Move 2 places left
  • ×0.001 → Move 3 places left
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