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Write >, <, or = in the blank.
1. 1.5m__3.9cm
2. 18m__1800mm
3. 4.5ft__1.5yd
4. 3ft__1m
5. 2m__2yd
6. 1km__1mi
7. 1km^2__1mi^2
8. 1ha__1acre
9. 1m^2__1yd^2
10. 1cm^2__1in^2​