Order of Operation

Order of Operations

In performing the orde of operations , the MDAS rule must be followed. 1. Do Multiplication or Division from left to right. 2. If there is no multiplication or division that remains in the number sentence, do Addition or Subtraction from left to the right.

Multiple Select

In performing Orders of Operation , Does the calculator same answer if you follow the rules in order of Operations ?

• No , because they have no the same procedure

• No, because Order of Operation has its own rules which is MDAS

• No , because calculator is differently not similar to manual.

• none of the above

Answering Problem solving using MDAS:

Ex. A certain buko pie store in Laguna has a holiday promo for its loyal customers. For every 5 boxes of buko pie, there will be a discount of 90 pesos. If Ed wants to buy 5 boxes at 140.00 per box , how much will hen pay?

Solution :

5 x 140 - 90 = n Do multiplication first.

700 - 90 = n Do subtraction next.

610 = n

Therefore , Ed will pay 610.00 when he buys 5 boxes of buko pie.

Multiple Choice

What are the rules in Order of Operations?

• SMDA

• MDSA

• MDAS

• SMAD

QUICK FACTS :

• There are calculators that follow the rule on order of operations. On calculators , the symbols used for addition and subtraction are + and - respectively .For multiplication and division, aside from the symbols and , some calculators use * and / for multiplication and division. 

• Press 25 - 3 * 4 + 10 / 5 = n What is the result ? If you will perform the operations manually and apply the rule , you will get the same result ?

Multiple Select

In performing the order of Operations , is the answer of calculator same when you perform manually ?

• Yes , because it is the same procedure

• No , because calculator is not doing MDAS rule

• No , because in solving Order of Operation , rules must be followed and not by using calculator.

• None of the above.