1) (2.68 x 10¯^{5}) x (4.40 x 10¯^{8})

The calculator display gives 1.1792 x 10¯^{12}. Rounded off to three significant figures gives 1.18 x 10¯^{12} as the answer.

2) (2.95 x 10^{7}) ÷ (6.28 x 10^{15})

The calculator display gives 4.6975 x 10¯^{9}. Rounded off to three significant figures gives 4.70 x 10¯^{9} as the answer.

3) (8.41 x 10^{6}) x (5.02 x 10^{12})

The calculator display gives 4.2218 x 10^{19}. Rounded off to three significant figures gives 4.22 x 10^{19} as the answer.

When done as a division, the answer to this problem is 1.68 x 10¯^{6}.

4) (9.21 x 10¯^{4}) ÷ (7.60 x 10^{5})

The calculator display gives 1.2118 x 10¯^{9}. Rounded off to three significant figures gives 1.21 x 10¯^{9} as the answer.
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