Units and currencies

Find an example of how to create a question with units below. See which units and metric prefixes are available.

Example 1: Units

Let us create a basic question with units:

We need to enable the units and prefixes we want to use in Input options > Input syntax. You can check only those units and prefixes you are interested in or use the All tab.

Then, we need to generate the random variable, which will be requested to be converted, and the corresponding correct. We'll add a as a basic random variable accordingly, and the correct answer inside the evaluate command.

Tip

You can see more details regarding how to create random basic variables here.

Finally, you can also select the Match unit of measure validation option to force the student's answer to be expressed in meters.

Units

Basic units of the SI

Magnitude	Name	Symbol
Length	meter	m
Mass	kilogram	kg
Time	second	s
Electric current	amper	A
Thermodynamic temperature	kelvin	K
Quantity of substance	mol	mol
Luminous intensity	candela	cd

Units derived from SI

Magnitude	Name	Symbol
Plane angle	radian	rad
Solid angle	steradian	sr
Frequency	hertz	Hz
Force	newton	N
Pressure, strain	pascal	Pa
Pressure, strain	atmosphere	atm
Energy, work, quantity of heat	joule	J
Energy	electronvolt	eV
Power, radiant flux	watt	W
Electric potential difference, electromotive force	volt	V
Capacitance	farad	F
Electrical resistance	ohm	$\Omega$
Electrical charge	coulomb	C
Electrical conductivity	siemens	S
Magnetic flux	weber	Wb
Magnetic flux density	tesla	T
Inductance	henry	H
Luminous flux	lumen	lm
Illuminance	lux	lx
Radioactivity	becquerel	Bq
Absorbed dose	gray	Gy
Equivalent dose	sievert	Sv
Catalytic activity	katal	Kat
Molar concentration	molar	M
Unit of mass	dalton	u

Units from other systems

Magnitude	Name	Symbol
Time	hour	h
Time	minute	min
Volume	liter	l
Pressure, strain	bar	b
Force	kilopond	kp
Length	yard	yd
Length	foot	ft
Length	inch	in
Length	mile	mi
Length	nautical mile	nmi
Volume	gallon	gal
Mass	ounce	oz
Mass	pound	lb
Volume	fluid ounce	floz
Volume	pint	pt

Metric prefixes

See below a list of the currently accepted metric prefixes:

Metric prefixes

Text	Symbol	Factor	Power
exa	E	$1000000000000000000$	$10^{18}$
peta	P	$1000000000000000$	$10^{15}$
tera	T	$1000000000000$	$10^{12}$
giga	G	$1000000000$	$10^9$
mega	M	$1000000$	$10^6$
kilo	k	$1000$	$10^3$
hecto	h	$100$	$10^2$
deca	da	$10$	$10^1$
deci	d	$0.1$	$10^{-1}$
centi	c	$0.01$	$10^{-2}$
mili	m	$0.001$	$10^{-3}$
micro	$\mu$	$0.000001$	$10^{-6}$
nano	n	$0.000000001$	$10^{-9}$
pico	p	$0.000000000001$	$10^{-12}$
femto	f	$0.000000000000001$	$10^{-15}$
atto	a	$0.000000000000000001$	$10^{-18}$

Example 2: Currencies

Let us create a basic question with currencies:

As you have seen in the example involving units, you need to enable the currencies in Input options > Input syntax. Notice all currencies can be selected with only one box.

The algorithm is straightforward. Notice that if you want to make an algorithm for a question with currencies, you must use the corresponding CalcMe symbol under the Units of measure tab.

To conclude, currencies are similar to physical units, and we have to take into account:

You can do basic arithmetic with currencies, unless convert() between them.
Students can write the currency symbol at left ($12) or right (34€). Both styles will be graded as correct.
Students must type the currency symbol using their keyboard. The toolbar for the answer doesn't have any currency symbols. So please ensure that students have the symbol on their keyboard! Alternatively, provide it in the question wording for them to copy & paste.

Currencies

See below a list of the currently accepted currencies:

Currencies

Symbol	Name
BTC	Bitcoin
$	Dollar
€	Euro
Fr	Franc
kr	Koruna/Krona/Krone
£	Pound
₽	Ruble
₹	Rupee
₩	Won
¥	Yen/Yuan

In this section:

Units and currencies

Example 1: Units

Tip

Units

Basic units of the SI

Units derived from SI

Units from other systems

Metric prefixes

Metric prefixes

Example 2: Currencies

Currencies

Currencies

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