Calculation without a calculator

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@yanzalong (10151)
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 (118588)
• 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 (10151)
• 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 (118588)
• Bunbury, Australia
14 Dec
@yanzalong They don't make mistakes in your favour do they?
1 person likes this
@yanzalong (10151)
• Indonesia
14 Dec
@JudyEv No they don't.
1 person likes this
@cahaya1983 (10060)
• 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 (10151)
• Indonesia
14 Dec
Especially if the bill calculation was handwritten. The mistakes may occur.
1 person likes this
@jstory07 (65331)
• Roseburg, Oregon
14 Dec
I am pretty good at adding figures in my head.
2 people like this
@yanzalong (10151)
• Indonesia
14 Dec
That's great my friend. I cannot do it without a calculator now.
@Shavkat (56634)
• Philippines
14 Dec
I do recheck it. I need to do it. Sometimes they can commit mistakes in calculation.
1 person likes this
@yanzalong (10151)
• Indonesia
14 Dec
Did they do it on purpose?
1 person likes this
@Shavkat (56634)
• 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
@yanzalong (10151)
• Indonesia
15 Dec
@Shavkat You are right, my friend.
1 person likes this
• Guangdong, China
14 Dec
well, I was good at math during school times.
1 person likes this
@yanzalong (10151)
• Indonesia
14 Dec
Now lost touch on it?
• 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 (10151)
• Indonesia
15 Dec
@peachpurple (12370)
• Malaysia
14 Dec
Recheck
1 person likes this
@yanzalong (10151)
• Indonesia
14 Dec
Yes. Who knows.
1 person likes this
@peachpurple (12370)
• Malaysia
14 Dec
@yanzalong calculator is accurate
@LadyDuck (147241)
• Switzerland
14 Dec
I can do math without a calculator because we also could not use one when I was a student. I always check the total of the bills, you never know.
1 person likes this
@yanzalong (10151)
• 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
@Madshadi (8953)
• Brussels, Belgium
14 Dec
I am bad at math. Even simples figures could get me confused sometimes
1 person likes this
@yanzalong (10151)
• Indonesia
15 Dec
It takes practice my friend.
1 person likes this
@marlina (71238)
• Canada
14 Dec
We were not allowed to use calculators in school which was good
1 person likes this
@yanzalong (10151)
• Indonesia
15 Dec
I wasn't either. I studied accounting; none was allowed to use calculators at the time.
@dodoazo (17310)
• 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
@yanzalong (10151)
• Indonesia
14 Dec
I have no idea about it.
@Hannihar (29629)
22 Feb
I need to carry a calculator around with me. I am terrible at math.