Explanation:
1 meter = 100 centimeter = 1000 millimeter
therefore, 1 cm = 10 mm
4.6 m = 4.6 × 1000 = 4600 mm
88 cm = 880 mm
and so, they cut off
880 mm + 1630 mm = 2510 mm
that means
4600 - 2510 = 2090 mm = 2.09 m
are left.
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