2711 rounded to 2 significant digits is 2700
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6.36*10^2
1,000 to 2 s.f., or 1,000 (2 s.f.) or 1,000.
236+710 = 946. Rounded to 2 significant digits, that is 950, rounded to one sd, it is 900.
2 of them are significant.
There are 5 significant digits in number 14500. To count for a given number as to how many significant digits does it have, look for the first zero form left and decimal point. For ex sample 0045 has 2 significant digits 0.0045 has 2 significant digits 0.4500 has 4 significant digits.