2.5 metres is 2500mm therefore the answer is 50 - all without the aid of a calculator.
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To find out how many pieces of ribbon each 4.5 cm long can be cut from a length of 4.5 metres, first convert 4.5 metres to centimetres: 4.5 metres is 450 cm. Next, divide the total length by the length of each piece: 450 cm ÷ 4.5 cm = 100. Therefore, you can cut 100 pieces of ribbon from a length of 4.5 metres.
So you can see how many spaces are missing
Since eight ft is longer than the length of the whole ribbon (3 fourth ft), the answer is : none.
In order for there to be equal pieces, the length of the pieces must be factors of both the length of the ribbon and the object. Thus, there are actually many answers. For example: 2,4,6,8, and 16 inch pieces both work.