19 phần 7
a ) 341 km2 < 341 000 ha
b ) 129 000 mm2 > 12 dm2 9 mm2
a - 4 5 phần 6
b - 2 3 phần 8
ham it thoiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiii
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