choose the suitable unit to measure each object:, cm, m, choose the suitable unit to measure each object:, m, cm, choose the suitable unit to measure each object:, m, cm, choose the suitable unit to measure each object:, cm, m, choose the suitable unit to measure each object:, cm, m, choose the suitable unit to measure each object:, cm, m, choose the suitable unit to measure each object:, cm, m

Measuring length

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