Rounding refers to the rounding of decimal places. On a till slip you are likily to encounter this where a product is sold by weight and so the price is not a nice clean $2.99 but more realistically $2.987 (becuase the weight is multiplied by the priced per weight). In the above example $2.987 would be rounded up to $2.99
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The answer depends on where in the world. In most countries, goods and services are priced so that any relevant taxes are included. However, if things are price net of tax, then usually a percentage amount needs to be added. This percentage amount may not (usually will not) come out as an exact number of minor currency units (cents, pennies, etc) and will need to be rounded.
What is 21 rounded to the nearest 10
That would depend on what you were rounding it to. If rounding to the nearest whole number, then it does not need rounding. If rounding to the nearest ten, it would be 420. If rounding to the nearest hundred, it would be 400.
The depends to what decimal place you are rounding the number.If you are rounding to hundredths, it will be 2.27If you are rounding to tenths, it will be 2.3If you are rounding to the nearest whole number, it will be 2.
It is finding the average value (or cost) of a number of things and then rounding the answer to the nearest dollar.
What is the effect of rounding the entrance of the mouthpiece?