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Maths · Grade 4 · Set B
Turns on a clock and a circle
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B
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Remember: A full turn is 360 degrees. Cut it into equal turns and share 360 to find one: 8 equal turns are 45 degrees each.

Fractions of a turn

1
The long hand of a clock starts at 12 and turns all the way to 6. Which turn is that?
a quarter turna half turna full turn
2
Two quarter turns make a half turn, which is 180 degrees.
TrueFalse
3
Which picture shows a turn of 180 degrees?
A
B
C
4
The long hand starts at 12 and turns clockwise to 9. How many degrees did it turn?
5
A circle is cut into 8 equal turns. One turn is shaded. How many degrees is it?
6
A pizza is cut into 6 equal slices. Each slice is the same turn at the middle. How many degrees is one slice?

Adding turns

7
Five of the six equal turns are shaded. How many degrees is the shaded turn?
8
Two angles are put side by side. One is 45 degrees and one is 90 degrees. How many degrees in all?
9
A 100 degree turn and an 80 degree turn together make a half turn.
TrueFalse
10
Pip turns a dial 75 degrees, then 25 degrees more, then 80 degrees more. How many degrees in all?
11
Join each clock turn to its degrees.
  1. 112 to 3
  2. 212 to 6
  3. 312 to 9
  4. 412 all the way round
  • A180 degrees
  • B270 degrees
  • C90 degrees
  • D360 degrees
12
Put the turns in order from smallest to biggest.
  • a quarter turn
  • a turn of 100 degrees
  • a turn of 45 degrees
  • a half turn
13
Write how you would find the degrees in one turn when a circle is cut into 5 equal turns.
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Answer key · Set B
Turns on a clock and a circle
1a half turn 12 to 6 is half way round the clock. It is a half turn.
2True A quarter turn is 90 degrees, and 90 + 90 = 180.
3C 180 degrees is a half turn, 4 of 8 equal parts. A is 90 degrees and B is 270 degrees.
4270 12 to 3 is 90 degrees, 12 to 6 is 180 and 12 to 9 is 270.
545 360 split into 8 equal turns is 45 degrees each.
660 360 split into 6 equal turns is 60 degrees each.
7300 One turn is 60 degrees, and 5 × 60 = 300.
8135 Turns add up: 45 + 90 = 135 degrees.
9True 100 + 80 = 180, and 180 degrees is a half turn.
10180 75 + 25 = 100, and 100 + 80 = 180 degrees.
111-C, 2-A, 3-B, 4-D
122, 3, 1, 4 A quarter turn is 90 degrees and a half turn is 180 degrees. In order: 45, 90, 100, 180.
13Your own words: a grown-up reads it.
Mark each answer, count the right ones and write the score on the sheet.