876 493 876 000 or 876 x 105 Perform the following operations giving the proper number of significant figures in the answer. Each of the following numbers is exact ie known with infinite precision. Pin On Teaching Ideas 789534 00945 x 147 02 00005. . 5457 546 23. To round off it to 3 significant digits we required to round it off to 1 place after the decimal. Round off each of the following to three significant figures. The r eliable digits plus the first uncertain digit are known as significant digits or significant figures. Round off 10546 to 4 3 2 and 1 significant figures. Non-zero digits are always significant. 673 has 3 significant figures 6 7 and 3. 8 351 000 000 000. 5 63477 104. Round off each of the following numbers to three significant digits. 1006 for example has four significant digits. 27651 x 10 - 3 277 x 10 - 3 c. Given a positive number n n 1 round-off th...