Mathematics for IGCSE & O level - Using A Calculator (Section 4)
1
What is the inverse operation of subtraction?
2
If you multiply 45 by 0.5, what will be the result?
3
What is an alternative term for scientific notation?
4
When should units be included in an answer?
5
If a calculator shows the answer as 4.5 x 10^-3, in what format is the answer?
6
In the equation for the surface area of a sphere, $$A = 4pi r^2$$, what does 'r' represent?
7
If you wanted to enter a time of 2 hours 30 minutes into your calculator and the calculator display uses a decimal format, what would you enter?
8
If the question uses the \( \boxed{EXP} \) key, what is this also known as?
9
When using the calculator, what should the user estimate?
উত্তর(B)
The result of the calculation.
10
If you enter a fraction incorrectly, what happens?
11
How should the result be presented if no degree of accuracy is provided?
উত্তর(B)
With three significant figures.
12
What type of key will show \( \boxed{EXP} \) ?
13
If you need to input a time of 1 hour 15 minutes into the calculator, what do you enter?
14
What will the result be when you multiply 45 with a number equal to 1?
15
If 45 is divided by a number greater than 1, what can you expect?
16
If a person earns $$1.80 per person, and there are 10 people, how much do they earn?
17
When entering time into a calculator, what key is used to change the answer to hours, minutes, and seconds?
উত্তর(A)
The degree key ( ° ' '' ).
