Download presentation

Presentation is loading. Please wait.

Published byMiguel Keyte Modified over 2 years ago

1
Maths Smart Grade 4 © 2012 Alston Publishing House Pte Ltd 8-point compass

2
Maths Smart Grade 4 © 2012 Alston Publishing House Pte Ltd

3
Acute angle

4
Maths Smart Grade 4 © 2012 Alston Publishing House Pte Ltd Angles smaller than 90 are called acute angles. Example:

5
Maths Smart Grade 4 © 2012 Alston Publishing House Pte Ltd Approximately equal to ( )

6
The sign means approximately equal to. Example: (when rounded to the nearest ten) Approximately equal to ( ) Maths Smart Grade 4 © 2012 Alston Publishing House Pte Ltd

7
Centre mark

8
Maths Smart Grade 4 © 2012 Alston Publishing House Pte Ltd

9
Common factors

10
Maths Smart Grade 4 © 2012 Alston Publishing House Pte Ltd Example: 1 and 2 are common factors of 6 and 10.

11
Maths Smart Grade 4 © 2012 Alston Publishing House Pte Ltd Common multiples

12
Maths Smart Grade 4 © 2012 Alston Publishing House Pte Ltd Example: 6, 12 and 18 are some common multiples of 2 and 3.

13
Maths Smart Grade 4 © 2012 Alston Publishing House Pte Ltd Coordinates

14
Maths Smart Grade 4 © 2012 Alston Publishing House Pte Ltd Example: The strawberry is located at the point (2, 4). The point (2, 4) is a pair of coordinates.

15
Maths Smart Grade 4 © 2012 Alston Publishing House Pte Ltd Coordinate grid

16
Maths Smart Grade 4 © 2012 Alston Publishing House Pte Ltd Example: This is a coordinate grid.

17
Maths Smart Grade 4 © 2012 Alston Publishing House Pte Ltd Degree ( )

18
We measure the size of an angle in degrees. We can also write for degree(s). Degree ( ) Maths Smart Grade 4 © 2012 Alston Publishing House Pte Ltd

19
East

20
Maths Smart Grade 4 © 2012 Alston Publishing House Pte Ltd

21
Factors

22
Maths Smart Grade 4 © 2012 Alston Publishing House Pte Ltd The factors of a number are the numbers that it can be divided exactly by. Example: The factors of 40 are 1, 2, 4, 5, 8, 10, 20 and 40.

23
Maths Smart Grade 4 © 2012 Alston Publishing House Pte Ltd Heptagon

24
Maths Smart Grade 4 © 2012 Alston Publishing House Pte Ltd A heptagon has 7 straight sides and 7 vertices. Example:

25
Maths Smart Grade 4 © 2012 Alston Publishing House Pte Ltd Hundreds

26
Maths Smart Grade 4 © 2012 Alston Publishing House Pte Ltd Example: 2 hundreds = 200 We can say that the value of 2 hundreds is the same as 200.

27
Maths Smart Grade 4 © 2012 Alston Publishing House Pte Ltd Inner scale

28
Maths Smart Grade 4 © 2012 Alston Publishing House Pte Ltd

29
Irregular polygon

30
Maths Smart Grade 4 © 2012 Alston Publishing House Pte Ltd An irregular polygon has sides and angles that are not all equal. Example:

31
Maths Smart Grade 4 © 2012 Alston Publishing House Pte Ltd Multiples

32
Maths Smart Grade 4 © 2012 Alston Publishing House Pte Ltd A multiple of a number is the product of that number and any number. A number is a factor of all its multiples. Example: 3, 6, 9 and 12 are the first four multiples of 3.

33
Maths Smart Grade 4 © 2012 Alston Publishing House Pte Ltd Net

34
Maths Smart Grade 4 © 2012 Alston Publishing House Pte Ltd A figure which can be folded to form a solid is called the net of the solid. Example: This is a net of a cuboid.

35
Maths Smart Grade 4 © 2012 Alston Publishing House Pte Ltd North

36
Maths Smart Grade 4 © 2012 Alston Publishing House Pte Ltd

37
North-east

38
Maths Smart Grade 4 © 2012 Alston Publishing House Pte Ltd

39
North-west

40
Maths Smart Grade 4 © 2012 Alston Publishing House Pte Ltd

41
Obtuse angle

42
Maths Smart Grade 4 © 2012 Alston Publishing House Pte Ltd Angles greater than 90 but smaller than 180 are called obtuse angles. Example:

43
Maths Smart Grade 4 © 2012 Alston Publishing House Pte Ltd Octagon

44
Maths Smart Grade 4 © 2012 Alston Publishing House Pte Ltd An octagon has 8 straight sides and 8 vertices. Example:

45
Maths Smart Grade 4 © 2012 Alston Publishing House Pte Ltd Origin

46
The pair of coordinates (0, 0) is called the origin. Origin Maths Smart Grade 4 © 2012 Alston Publishing House Pte Ltd

47
Outer scale

48
Maths Smart Grade 4 © 2012 Alston Publishing House Pte Ltd

49
Polygon

50
Maths Smart Grade 4 © 2012 Alston Publishing House Pte Ltd A polygon is a closed figure. Its sides are formed by straight lines that do not cross one another. Example:

51
Maths Smart Grade 4 © 2012 Alston Publishing House Pte Ltd Prime numbers

52
A prime number has only two factors, 1 and the number itself. Prime numbers Maths Smart Grade 4 © 2012 Alston Publishing House Pte Ltd

53
Product

54
When we multiply numbers, the answer is called the product. Product Maths Smart Grade 4 © 2012 Alston Publishing House Pte Ltd

55
Protractor

56
Maths Smart Grade 4 © 2012 Alston Publishing House Pte Ltd We can find the size of an angle by measuring it with a protractor. Example:

57
Maths Smart Grade 4 © 2012 Alston Publishing House Pte Ltd Quadrilateral

58
Maths Smart Grade 4 © 2012 Alston Publishing House Pte Ltd A quadrilateral has 4 straight sides and 4 vertices. Example:

59
Maths Smart Grade 4 © 2012 Alston Publishing House Pte Ltd Quotient

60
Maths Smart Grade 4 © 2012 Alston Publishing House Pte Ltd When we divide a number by another, the answer we get is called the quotient. Example:

61
Maths Smart Grade 4 © 2012 Alston Publishing House Pte Ltd Regroup

62
We need to regroup in a place value when -we get more than 9 after adding or multiplying; or -we subtract a greater number from a smaller number; or -we get a remainder in place values other than the ones place when dividing Regroup Maths Smart Grade 4 © 2012 Alston Publishing House Pte Ltd

63
Regular polygon

64
Maths Smart Grade 4 © 2012 Alston Publishing House Pte Ltd A regular polygon has all equal sides and all equal angles. Example:

65
Maths Smart Grade 4 © 2012 Alston Publishing House Pte Ltd Remainder

66
Maths Smart Grade 4 © 2012 Alston Publishing House Pte Ltd Remainder is the amount that is left over when a number is divided by another number. Example:

67
Maths Smart Grade 4 © 2012 Alston Publishing House Pte Ltd Right angle

68
Maths Smart Grade 4 © 2012 Alston Publishing House Pte Ltd A right angle is 90. Example:

69
Maths Smart Grade 4 © 2012 Alston Publishing House Pte Ltd Round to the nearest hundred

70
When we round a number to the nearest hundred, we look at the digit in the tens place. (a)If the digit < 5, we round it to the smaller hundred. (b)If the digit > 5, we round it to the bigger hundred. (c)If the digit = 5, we round it to the bigger hundred. Round to the nearest hundred Maths Smart Grade 4 © 2012 Alston Publishing House Pte Ltd

71
Round to the nearest thousand

72
When we round a number to the nearest thousand, we look at the digit in the hundreds place. (a)If the digit < 5, we round it to the smaller thousand. (b)If the digit > 5, we round it to the bigger thousand. (c)If the digit = 5, we round it to the bigger thousand. Round to the nearest thousand Maths Smart Grade 4 © 2012 Alston Publishing House Pte Ltd

73
South

74
Maths Smart Grade 4 © 2012 Alston Publishing House Pte Ltd

75
South-east

76
Maths Smart Grade 4 © 2012 Alston Publishing House Pte Ltd

77
South-west

78
Maths Smart Grade 4 © 2012 Alston Publishing House Pte Ltd

79
Thousands

80
Maths Smart Grade 4 © 2012 Alston Publishing House Pte Ltd Example: 5 thousands = 5000 We can say that the value of 5 thousands is the same as 5000.

81
Maths Smart Grade 4 © 2012 Alston Publishing House Pte Ltd Unit

82
Maths Smart Grade 4 © 2012 Alston Publishing House Pte Ltd Each in a bar model stands for 1 unit. Example: 1 unit 29 5 units 29 × 5 = 145

83
Maths Smart Grade 4 © 2012 Alston Publishing House Pte Ltd West

84
Maths Smart Grade 4 © 2012 Alston Publishing House Pte Ltd

85
X-axis

86
Maths Smart Grade 4 © 2012 Alston Publishing House Pte Ltd

87
X-coordinate

88
Maths Smart Grade 4 © 2012 Alston Publishing House Pte Ltd

89
Y-axis

90
Maths Smart Grade 4 © 2012 Alston Publishing House Pte Ltd

91
Y-coordinate

92
Maths Smart Grade 4 © 2012 Alston Publishing House Pte Ltd

93
Zero line

94
Maths Smart Grade 4 © 2012 Alston Publishing House Pte Ltd

Similar presentations

© 2017 SlidePlayer.com Inc.

All rights reserved.

Ads by Google