MathWithNaziaa : MDAS : Multiplication Division Addition Subtraction

 MDAS

• M - Multiplication, D-  Division , A -  Addition, S-  Subtraction. 

• When all the operations are given together in the same question, we need to follow MDAS rule. 

• When multiplication and division operations are next to each other we will follow the left hand rule ie :  whichever operation comes first from the left side will be  solved  first.

For example:

1.  9 - 6 -3 x 8 ÷ 4 = 9 -6 -3 x 8 ÷ 4

                          = 9 - 6 - 24 ÷ 4

                                  = 9 - 6 - 6 

                                  = 9 - 12 

                                  = -3

2. 15 ÷ 3 x 10  ÷ 2 = 15 ÷ 3 x 10 ÷ 2

                          = 5 x 10 ÷ 2 

                          = 50 ÷ 2

                      = 25

3.  3 x 30 ÷ 10 = 3 x 30 ÷ 10

                           = 90 ÷ 10

                           = 9

4. 20 ÷ 5 x 4 = 20 ÷ 5 x 4

                 = 5 x 4

                = 20

5. 5 + 21 ÷ 7 x 4 - 5 = 5 + 21 ÷ 7 x 4 - 5

                            = 5 + 3 x 4 -5 

                            = 5 + 12 - 5

                            = 17 - 5

                            = 12

6.  8 x 2 + 3 - 10 ÷5 + 6 - 3 x 4 

                     = 8 x2 + 3 - 10 ÷ 5 + 6 - 3 x 4

                      = 16 + 3 - 2 + 6 - 12

                      = 19 -2 + 6 -12

                       = 17 + 6 -12

                       = 23 - 12

                        = 11