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Introduction to Measurement

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Introduction to Measurement

Help plan a small market stall. Show your working, include units in every answer, and round sensibly when needed.

Plan the stall

Use metric units and explain your choices.

1.A stall table is 1.8 m long. Convert its length to centimetres. Include the conversion you used.

2.A banner is 2.4 m long and 0.75 m wide. Calculate its area in square metres. Then convert the area to square centimetres.

3.The stall needs a rectangular mat measuring 2.4 m by 1.5 m. What is the mat’s perimeter? How much edging is needed to go all the way around it?

4.A storage crate is 60 cm long, 40 cm wide and 35 cm high. Calculate its volume in cm³ and then in litres. (1,000 cm³ = 1 L.)

5.A drink dispenser contains 3.6 L of lemonade. How many 250 mL cups can be filled completely? How much lemonade will remain?

Choose tools and check accuracy

Good measurements depend on using an appropriate tool and recording the result carefully.

6.Match each job to the most suitable tool: measure the table’s length; find the mass of a bag of apples; measure 500 mL of juice; measure the angle of a triangular sign. Choose from tape measure, scales, measuring jug and protractor.

Table length
Bag of apples’ mass
500 mL of juice
Angle of a triangular sign

Scales
Tape measure
Measuring jug
Protractor

7.A student measures a board as 1.26 m using a tape marked in centimetres. Which recording best matches the precision of the tool: 1 m, 1.3 m, 1.26 m or 1.2600 m? Explain briefly.

1 m
1.3 m
1.26 m
1.2600 m

8.A rectangular stall area measures 3.2 m by 2.5 m. A roll of floor covering is 1 m wide. What minimum length of covering is needed to cover the floor, ignoring joins and waste?

9.The corner of a display frame is measured as 92°. Is this angle acute, right, or obtuse? By how many degrees does it differ from a right angle?

10.A supplier advertises a juice container as holding 2 L. A measuring jug shows that it holds 1.92 L. Calculate the difference in millilitres. Give one reason the measured amount might differ from the advertised amount.