## Note on BODMAS Rule

• Note
• Things to remember
• Exercise
• Quiz

According to BODMAS you must do brackets first, then division, then multiplication, then addition and subtraction. When doing addition and subtraction, it is best to go left to right.

BODMAS is a common type of rule used in simplification. It means things like add, subtract, multiply, divide, squaring etc.

Here,

• BO refers to Bracket Open
{(3x4)} + {(5x7)}
3 x 4 + 5 x 7

• D denotes Divide
$$\frac{45}{-5}$$
Divide the absolute values
$$\frac{45}{-5}$$ = -9
The signs are opposite = -9
Thus, $$\frac{45}{-5}$$ = -9

• M refers to Multiply
15 x 4
Multiply the absolute values
15 x 4 =6

-5 + 15
-5 + 15 = 10
The sign is positive because we have to put the greater one.

• S denotes Subtract
8 -3
Subtract the absolute values
8 - 3 = 5
The sign is of positive.

• BODMAS stands for Brackets Of Division Multiplication Addition and Subtraction.
• BODMAS is a common type of rule used in simplification. It means things like add, subtract, multiply, divide, squaring etc.
.

### Very Short Questions

Solution:

-41 - 3 (-11)

= -41 + 33

= -8

Solution:

-6× 2 - 12 (-2)

= -12 +24

= 12

Solution:

-24÷ (-3)× 5÷ 4

= 8 × 5 ÷ 4

= 40 ÷ 4

= 10

Solution:

= (-6)2 -4 × 5 (-2)

= 36 - 4 × 5 (-2)

=36 -20 (-2)

= 36 + 40

= 76

Solution:

5 -2 | 7 - 10 |

= 5 - 2 | -3 |

= 5 - 2 $$\times$$ 3

= 5 - 6

= - 1

solution:

- 41 -3 (-11)

= - 41 + 33

= -8

Solution:

25 - 24÷ 8 + 3× 2

= 25 -3 + 3× 2

= 25 - 3 + 6

= 31 - 3

= 28

Solution:

20 - {8 - (15 +2)}

= 20 - { 8 - 17}

= 20 - {8 - 17}

= 20 - {-9}

= 20 + 9

= 29

Solution:

17 - {19 - 2 (1 + 3)}

= 17 - {19 - 2 $$\times$$ 4}

= 17 - {19 - 8}

= 17 - 11

= 6

Solution:

= - 16 + { 8 ×( 2 + 4) }

= - 16 + { 8 × 6 }

= - 16 + 48

= 32

Solution:

50÷ {18 - 4 × 10 ÷ 2}

= 50 ÷ { 18 - 4 × 5}

= 50 ÷ { 18 -20}

= 50 ÷ { -2}

= - 25

Solution:

- 3 + 7 ( -4)

= -3 - 28

= - 31

Solution:

- 5 (- 25) ÷ 25× (-4)

= -5 (-25) ÷ 25× (-4)

= -5 × -1 × -4

= 5 × -4

= -20

0%

-41
43
41
44

5
3
-3
7

25
30
20
-20

45
36
35
37

57
55
58
-55

75
80
77
76

11
-10
12
10

28
30
29
25

41
-41
42
43

107
103
105
109

88
-83
87
83

37
31
39
33

-31
33
35
37

15
11
-8
8

-30
33
35
30