1.
Round 65.3 to 1 significant figure
Correct Answer
B. 70
Explanation
6 is the first significant figure. The 5 will cause the 6 to round up. The 0 is still necessary to keep the same value of the number.
2.
Round 6.581 to 2 significant figures.
Correct Answer
B. 6.6
Explanation
5 is the second significant figure. The 8 will cause the 5 to round up. It is incorrect to write zeros at the end, which will add additional significant figures.
3.
Round 0.7438 to 2 significant figures.
Correct Answer
D. 0.74
Explanation
4 is the second significant figure. The 3 will cause the 4 to stay the same. It is incorrect to write zeros at the end, which will add additional significant figures.
4.
Round 0.0052135 to 3 significant figures.
Correct Answer
D. 0.00521
Explanation
1 is the third significant figure. The 3 will cause the 1 to stay the same. It is incorrect to write zeros at the end, which will add additional significant figures. Zeros at the front of nonzero numbers are not considered significant.
5.
Round 481.4 to 3 significant figures.
Correct Answer
A. 481
Explanation
1 is the third significant figure. The 4 will cause the 1 to stay the same. It is incorrect to write zeros at the end, which will add additional significant figures.
6.
Round 0.298204 to 1 significant figure.
Correct Answer
C. 0.3
Explanation
2 is the first significant figure. The 9 will cause the 2 to round up. It is incorrect to write zeros at the end, which will add additional significant figures.
7.
Round 80.2543 to 4 significant figures.
Correct Answer
C. 80.25
Explanation
5 is the fourth significant figure. The 4 will cause the 5 to stay the same. It is incorrect to write zeros at the end, which will add additional significant figures.
8.
Round 54123.82 to 4 significant figures.
Correct Answer
C. 54120
Explanation
2 is the fourth significant figure. The 3 will cause the 2 to stay the same. The 0 is still necessary to keep the same value of the number. The decimal and the two zeros after the decimal are not necessary and will add additional significant figures.
9.
Round 0.002852895 to 3 significant figures.
Correct Answer
A. 0.00285
Explanation
5 is the third significant figure. The 2 will cause the 5 to stay the same. It is incorrect to write zeros at the end, which will add additional significant figures.
10.
Round 0.000 025 385 631 to 3 significant figures.
Correct Answer
C. 0.000 025 4
Explanation
3 is the third significant figure. The 8 will cause the 3 to round up. It is incorrect to write zeros at the end, which will add additional significant figures.
11.
Round 10.2 to 1 significant figure.
Correct Answer
B. 10
Explanation
1 is the first significant figure. The 0 will cause the 1 to stay the same. The 0 is still necessary to keep the same value of the number.
12.
Round 0.05060 to 2 significant figure.
Correct Answer
B. 0.051
Explanation
Third 0 is the second significant figure. The 6 will cause the 0 to round up. It is incorrect to write zeros at the end, which will add additional significant figures.
13.
Round 0.003501 to 2 significant figures.
Correct Answer
B. 0.0035
Explanation
5 is the second significant figure. The 0 will cause the 5 to stay the same. It is incorrect to write zeros at the end, which will add additional significant figures.
14.
Round 0.276 to 1 significant figure.
Correct Answer
C. 0.3
Explanation
2 is the first significant figure. The 7 will cause the 2 to round up.
15.
Round 5.0063 to 3 significant figures.
Correct Answer
B. 5.01
Explanation
The second 0 is the third significant figure. The 6 will cause the 0 to round up. It is incorrect to write zeros at the end, which will add additional significant figures.
16.
Round 8.2091 to 4 significant figures.
Correct Answer
B. 8.209
Explanation
9 is the fourth significant figure. The 1 will cause the 9 to stay the same. It is incorrect to write zeros at the end, which will add additional significant figures.
17.
Round 90710 to 2 significant figures.
Correct Answer
C. 91000
Explanation
0 is the second significant figure. The 7 will cause the 0 to round up. The 0 at the end of the round 1 is still necessary to keep the same value of the number.
18.
Round 0.0100331 to 5 significant figures.
Correct Answer
B. 0.010033
Explanation
The fourth 0 is the fifth significant figure. The 3 will cause the 0 to stay the same. It is incorrect to write zeros at the end, which will add additional significant figures.
19.
Round 73860.01 to 3 significant figures.
Correct Answer
C. 73900
Explanation
8 is the third significant figure. The 6 will cause the 8 to round up. The 0 is still necessary to keep the same value of the number.
20.
Round 0.002 365 730 8 to 4 significant figures.
Correct Answer
B. 0.002 366
Explanation
5 is the fourth significant figure. The 7 will cause the 5 to round up. It is incorrect to write zeros at the end, which will add additional significant figures.