Rounding & Estimation
Rounding means shortening a number. "dp" keeps digits after the decimal point. "sig fig" keeps meaningful digits from the start.
| Number | 1 dp | 2 dp | 1 sig fig | 2 sig fig |
|---|---|---|---|---|
| 47.438 | 47.4 | 47.44 | 50 | 47 |
| 3.14159 | 3.1 | 3.14 | 3 | 3.1 |
| 0.0769 | 0.1 | 0.08 | 0.08 | 0.077 |
| 129.8 | 129.8 | 129.80 | 100 | 130 |
Practice
Round 47.438 to 2 decimal places.
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