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Maths · Grade 3 · Set C
From one part to the whole
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C
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Goal: 15 min
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Remember: A unit fraction is one part out of equal parts. Count the small pieces to build the whole. A fraction depends on how big the whole is.

From one part to the whole

1
The square is cut into equal parts. One part is shaded. What fraction of the square is shaded?
2
The small piece is one fourth of the whole bar. Which bar is the whole?
A
B
C
3
The small piece is one third of the whole bar. Which bar is the whole?
A
B
C
4
The shaded bar is one fourth of the whole bar. It is 3 squares long. How many squares long is the whole bar?
5
A part of the left circle is bigger than a part of the right circle.
TrueFalse
6
Put the shaded pieces in order from the biggest piece to the smallest piece.
  • 1/4
  • 1/3
  • 1/8
  • 1/6

Think about the whole

7
The dot is at 1/4. How many equal parts is the line from 0 to 1 cut into?
8
The shaded part is 1/3 of each bar, so the shaded parts are the same size.
TrueFalse
9
Circle every picture that shows one fourth shaded.
A
B
C
D
E
10
Pip and Max each take one of the 6 equal slices. What fraction of the pizza is ONE slice?
11
Draw a rectangle and cut it into 8 equal parts. Shade one part and write its fraction.
12
Write how you know 1/6 of a circle is smaller than 1/3 of the same circle.
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Answer key · Set C
From one part to the whole
11/6 The square has 6 equal parts and 1 is shaded, so the fraction is 1/6.
2C Four of the small pieces make the whole. Bar C is 4 squares long.
3B Three of the small pieces make the whole. 2 + 2 + 2 = 6, so the whole bar is 6 squares long.
412 Four of the shaded bars make the whole. 3 + 3 + 3 + 3 = 12.
5True The left circle is cut into 4 parts and the right one into 6. Fewer parts means bigger parts.
62, 1, 4, 3 The fewer the equal parts, the bigger each part. So 1/3 is biggest and 1/8 is smallest.
74 The bottom number counts the equal parts in 1, so the line is cut into 4 parts.
8False Each is 1/3 of its own bar, but the bars are not the same length. The shaded part of the longer bar is bigger.
9A, B, E One fourth is 1 part out of 4 equal parts. C has 8 parts and D has 3 parts.
101/6 The pizza has 6 equal slices, so one slice is 1/6.
12Your own words: a grown-up reads it.
Mark each answer, count the right ones and write the score on the sheet.