Question

Which pair of numbers shows
the second number is an
estimation of the first?
0.00345; 0.003
275; 200
0.00345; 0.004
345; 400

Answer 1

To determine which pair shows that the second number is an estimation of the first, we need to consider if the second number is a rounded or simplified value of the first number.

1. **0.00345; 0.003** - Here, 0.003 is slightly lower than 0.00345 but not a typical rounding of it.
2. **275; 200** - The second number is much lower than the first, not a reasonable estimation.
3. **0.00345; 0.004** - The second number is a rounding of the first to three decimal places, which makes it a good estimation.
4. **345; 400** - Similarly, this is not a reasonable estimation as it rounds up significantly.

Based on this analysis, the pair that shows the second number as an estimation of the first is:

**0.00345; 0.004**