# Calculation without a calculator

By yanzalong

@yanzalong (10198)

Indonesia

December 14, 2017 12:44am CST

How well can you do a math without a help of a calculator? When I was still a student, I remember doing the math without a calculator. We were prohibited from using it. The purpose was to train students to be able to calculate figures quickly relying on their mathematical skill.
When we are at work, none can be done without the help of calculators. Computers are now equipped with formula that we require.
When you look at the bill notes, do you trust the total calculated by the seller? Or will you recheck the calculation?

9 people like this

11 responses

@JudyEv (126340)

• Bunbury, Australia

14 Dec

Mostly I have a good idea of the total should be. Most people seem to use calculators or tills where I shop so there isn't too much danger of making a mistake. We never had calculators at school. They only came into common use after I left school.

2 people like this

@yanzalong (10198)

• Indonesia

14 Dec

The same here. I am getting used to rechecking total amount written on the bill notes. Sometimes they made mistakes -- the amount was bigger than that I had to pay.

1 person likes this

@JudyEv (126340)

• Bunbury, Australia

14 Dec

@yanzalong They don't make mistakes in your favour do they?

1 person likes this

@cahaya1983 (10043)

• Malaysia

14 Dec

We weren't allowed to use it in primary school, but in secondary school we had to use the scientific calculator. I try to make it a habit to always check the bill amount and total.

2 people like this

@yanzalong (10198)

• Indonesia

14 Dec

Especially if the bill calculation was handwritten. The mistakes may occur.

1 person likes this

@yanzalong (10198)

• Indonesia

14 Dec

That's great my friend. I cannot do it without a calculator now.

@Shavkat (63540)

• Philippines

15 Dec

@yanzalong I am not sure. It could be unintentionally done. We are still humans and we can still commit mistakes.

1 person likes this

@Behindtheguitarbar (1641)

• Guangdong, China

14 Dec

well, I was good at math during school times.

1 person likes this

@Behindtheguitarbar (1641)

• Guangdong, China

15 Dec

@yanzalong er, only for some easy calculation job. Like doing the profit rate, kind of that. Not complecated in school.

1 person likes this

@yanzalong (10198)

• Indonesia

15 Dec

That's true. Rechecking the total of the bill is important, especially when it comes to big amount.

1 person likes this

@yanzalong (10198)

• Indonesia

15 Dec

I wasn't either. I studied accounting; none was allowed to use calculators at the time.

@dodoazo (20306)

• Philippines

14 Dec

Try to go to the market and observe small vendors. They're fast in giving you the total amount of what you buy and they're also fast in calculating the change of money.
That's what we call a practical math. That's an applied mathematics. Have you not asked how they did it? I was once a mathematics teacher and I taught my students how to simplify or to do the short cut computation by giving them the practical technique.

1 person likes this