CBSE Class 3 Mathematics Revision Worksheet Set 01

Q.1. Fill in the blanks.

a) Every fraction has a _________________________ and a ________________________.
Answer: numerator, denominator
In simple words: Every fraction is made of two parts: a top number (numerator) and a bottom number (denominator).

Exam Tip: Remember that the numerator tells the number of parts chosen, and the denominator tells the total equal parts.

b) In \(5/6\), 5 is __________________________ and 6 is __________________________.
Answer: numerator, denominator
In simple words: The top number 5 is the numerator and the bottom number 6 is the denominator.

Exam Tip: Keep the order straight: numerator is always on top, denominator on the bottom.

c) One half is ___________________ part out of two equal parts.
Answer: one
In simple words: One half means taking 1 part out of 2 equal parts.

d) One third is __________________ part out of three equal parts.
Answer: one
In simple words: One third means taking 1 part out of 3 equal parts.

Exam Tip: One-third is written as \(1/3\).

Q.2. Write fraction for the shaded parts.
Answer:
First figure (Triangle divided into 6 equal parts with 3 shaded): \(\frac{3}{6}\) (or \(\frac{1}{2}\))
Second figure (Rectangle divided into 5 equal parts with 1 shaded): \(\frac{1}{5}\)
Third figure (Grid divided into 12 equal parts with 4 shaded): \(\frac{4}{12}\) (or \(\frac{1}{3}\))
In simple words: Count the shaded parts to put on top, and count the total equal parts to put on the bottom.

Exam Tip: Always double check that all parts in the shape are equal before counting.

Q.3. Write the fraction to make a whole.
a) \(1/2 + \square = 1\)
Answer: \(1/2\)
In simple words: One-half plus another one-half makes one whole.

Exam Tip: When denominators are the same, add the numerators until they equal the denominator.

b) \(3/4 + \square = 1\)
Answer: \(1/4\)
In simple words: Three-fourths plus one-fourth makes four-fourths, which is 1.

Exam Tip: \(1\) can be written as any fraction where the numerator equals the denominator, such as \(4/4\).

c) \(1/4 + \square = 1\)
Answer: \(3/4\)
In simple words: One-fourth plus three-fourths makes one whole.

Exam Tip: Subtract the given numerator from the denominator to find the missing numerator.

Q.4. Shade one- third of each collection.
Answer:
a) Total stars = 6. One-third of 6 = \(6 \div 3 = 2\) stars to be shaded.
b) Total cylinders = 3. One-third of 3 = \(3 \div 3 = 1\) cylinder to be shaded.
c) Total hourglass shapes = 9. One-third of 9 = \(9 \div 3 = 3\) shapes to be shaded.
In simple words: Divide the total number of items in the collection by 3 to find how many to shade.

Exam Tip: Always count the total items first before finding a fraction of a collection.

Q.5. Encircle the fractions representing a whole.
\(2/4 \quad 1/4 \quad 3/3 \quad 1/1 \quad 3/4 \quad 4/4\)
Answer: \(\mathbf{3/3, 1/1, 4/4}\)
In simple words: A fraction represents a whole when the top number (numerator) is equal to the bottom number (denominator).

Exam Tip: Any fraction equal to 1 represents a whole.

Q.6. Write fractions using given numerators and denominators.
Numerators: 2, 3, 1, 3, 2, 4
Denominators: 6, 8, 5, 4, 8, 7
Answer:
\(\frac{2}{6}, \frac{3}{8}, \frac{1}{5}, \frac{3}{4}, \frac{2}{8}, \frac{4}{7}\)
In simple words: Place each numerator number above its corresponding denominator number.

Exam Tip: Maintain the exact column order given in the table.

Q.7. Divide the given figures in 4 equal parts.
Answer:
For the rectangle: Draw three equally spaced vertical lines inside the rectangle to divide it into 4 equal vertical strips.
For the circle: Draw a vertical line and a horizontal line passing through the center to divide the circle into 4 equal quadrants.
In simple words: Split each shape into 4 parts that are identical in size and shape.

Exam Tip: Use a ruler to ensure all parts are equal and symmetrical.

Q.8. Match
a) One-quarter          1/2
b) One-half               3/4
c) One-third              One-fourth
d) Three fourth          1/3
Answer:
a) One-quarter - One-fourth
b) One-half - 1/2
c) One-third - 1/3
d) Three fourth - 3/4
In simple words: Match each fractional word name with its correct numerical fraction or equivalent term.

Exam Tip: 'Quarter' and 'fourth' mean the exact same thing in fractions.

Q.9. Shade \(1/2\) of each.
Answer:
First figure (2 connected squares): Shade 1 square.
Second figure (Triangle divided into 2 halves): Shade 1 half.
Third figure (T-shape/pillar structure): Shade the left half or equivalent symmetrical half.
Fourth figure (6 connected squares): Shade 3 squares.
In simple words: Color exactly half of the total equal parts in each figure.

Exam Tip: Count the total units first, divide by 2, and shade that many units.

Q.10. If \(1/2 = \square\), then One whole = __________________________________________________________________
Answer: Two such parts combined (or \(2 \times \square\))
In simple words: Since two halves make one whole, one whole is equal to two times the half-part box.

Exam Tip: Two equal halves always make one complete whole.

Q.11. Write the fraction for unshaded parts.
Answer:
First figure: Total squares = 12, Shaded = 5, Unshaded = 7. Fraction = \(\frac{7}{12}\)
Second figure: Triangle divided into 2 equal parts, Shaded = 1, Unshaded = 1. Fraction = \(\frac{1}{2}\)
Third figure: Total rectangles = 10, Shaded = 3, Unshaded = 7. Fraction = \(\frac{7}{10}\)
In simple words: Count only the unshaded parts to put on top, and count all parts for the bottom.

Exam Tip: Read the question carefully to check whether it asks for shaded or unshaded parts.