The rule is - whatever number of decimal places you're rounding off to - look at the NEXT number...
For example - round 23.456 to two decimal places. The number in the THIRD decimal place is 5 or more so you round UP to get 23.46.
IF the number had been 23.454, you would round DOWN to yield 23.45.
There are 2 or 3 significant figures. It could be 894° rounded to 2 significant figures; It could be 889.6° rounded to 3 significant figures.
188,100 rounded to two significant figures is 190,000
There are two types of significant figures, measured and exact. Numbers are often rounded to avoid reporting insignificant figures. Numbers can also be rounded merely for simplicity rather than to indicate a given precision of measurement.
To one significant figure 7 Rounded off to two significant figures (tenths in your example) 7.4
Expressed as a decimal, rounded to three significant figures, 9/981 = 0.00917
There are 2 or 3 significant figures. It could be 894° rounded to 2 significant figures; It could be 889.6° rounded to 3 significant figures.
188,100 rounded to two significant figures is 190,000
Exactly what you typed. 144.78 rounded to 2 decimal places is 144.78. You may mean significant figures, in which case it would be 1.4*10^3 (2 significant figures).
11.0 (one decimal and 3 significant figures)
There are two types of significant figures, measured and exact. Numbers are often rounded to avoid reporting insignificant figures. Numbers can also be rounded merely for simplicity rather than to indicate a given precision of measurement.
It is then 0.067 when rounded to 2 significant figures
To one significant figure 7 Rounded off to two significant figures (tenths in your example) 7.4
You didn't say how many significant figures. But, rounded to six significant figures it would be 5206.00
It is 1300 rounded to 2 significant figures
It is 6.7 when rounded to 2 significant figures
That depends on how many significant figures you are talking about.If three significant figures then 700 is the largest that rounds to 700.If four significant figures are to be rounded to three significant figures then 700.4If five significant figures are to be rounded to three significant figures then 700.49If six significant figures are to be rounded to three significant figures then 700.499etc.
Expressed as a decimal, rounded to three significant figures, 9/981 = 0.00917