\(\frac{489.1375\times0.0483\times1.956}{0.0873\times92.581\times99.749} appx. \frac{489\times0.05\times2}{0.09\times93\times100}\)

= \(\frac{489}{9\times93\times10}\)

= \(\frac{163}{279\times\frac{1}{10}}\)

= \(\frac{0.58}{10}\)

=  0.58 appx. 0.06.

2 x 5 = 10.

Sum of decimal places = 4

 Therefore,  0.002 x 0.5 = 0.001

3.14 x 10⁶ = 3.14 x 1000000 = 3140000.

1 ÷ 0.2 = \(\frac{1}{0.2}=\frac{10}{2}=5;\)

0.2 = 0.222...;

(0.2)² = 0.04.

0.04 < 0.2 < 0.22....<5.

Since 0.04 is the least, so (0.2)² is the least.

Given Expression = \(\frac{8-2.8}{1.3} = \frac{5.2}{1.3}=\frac{52}{13}=4\)

Sum of decimal places = 7.

Since the last digit to the extreme right will be zero (since 5 x 4 = 20), so there will be 6 significant digits to the right of the decimal point.

6.46  = 6 + 0.46  = 6 + \(\frac{46}{99}=\frac{594+46}{99} = \frac{640}{99}.\)

101             \(\frac{27}{100000}=101+\frac{27}{100000}\)    = 101 + .00027 = 101.00027