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Maharashtra State BoardSSC (English Medium) 6th Standard

Multiplication of Fraction

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Multiplication of a fraction

Multiplication of fractions involves multiplying the numerators and denominators separately. Fractions with different denominators can be multiplied directly without any modifications. However, mixed fractions must first be converted into improper fractions.

  • Step 1: Multiply the numerators. 
  • Step 2: Multiply the denominators.
  • Step 3: Reduce the resultant fraction to its lowest terms.

Example: `"3"/"5"` × `"1"/"2"`1. Start with a Rectangle (Strip):

  • Draw a rectangle to represent one whole.

2. Divide Vertically into 5 Equal Parts:

  • Make 5 equal vertical sections to show the denominator of the first fraction`"3"/"5"`

3. Shade 3 out of 5 Parts:

  • Shade 3 parts to show `"3"/"5"`

4. Divide Horizontally into 2 Equal Parts:

  • Now divide the same rectangle horizontally into 2 equal parts for the second fraction `"1"/"2"`

5. Shade 1 out of 2 Horizontal Parts Differently:

  • Shade 1 part horizontally in a different way (like crosshatching or a different colour).

6. Find the Overlapping Part (Double Shaded):

  • The parts that are shaded both ways represent
    `"1"/"2"` of  `"3"/"5"`

  • Count the total small boxes: there are 10 equal parts now (5 × 2).

  • Count the boxes shaded twice: 3 boxes.

7. Write the Final Fraction:

  • The part shaded twice is `"3"/"10"`

  • So,
    `"3"/"5"`×`"1"/"2"`=`"3"/"10"`
    `"3"/"5"`×`"1"/"2"`=`"3×1"/"5×2"` = `"3"/"10"`

Example

Sulochanabai owns 42 acres of farmland. If she planted wheat on `2/7` of the land, on how many acres has she planted wheat?

We must find out 2 7 of 42 acres

∴ `42/1 xx 2/7 = (42 xx 2)/(1xx 7) = (6 xx 7 xx 2)/7 × × = 12`

Sulochanabai has planted wheat on 12 acres of land.

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Shaalaa.com | Multiplication of a Proper Fraction by an Improper Fraction

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Multiplication of a Proper Fraction by an Improper Fraction [00:15:35]
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