Estimation, Bounds & Accuracy Assessment

7 questions · 12 parts · 14 marks

0/14 marks

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1aEasy1 mark

A length is recorded as 7.2 cm to the nearest 0.1 cm. Which interval is correct?

2aMedium1 mark

A mass is 2.6 kg correct to the nearest 0.1 kg. What is the lower bound?

Answer

2bHard3 marks

Create a clear annotated answer on the canvas. Use a diagram, graph, flowchart, equation layout and/or concise labels to show your reasoning.

A rectangle has length 8.0 m and width 3.0 m, each rounded to the nearest metre. Explain how to find bounds for its area.

Draw with the mouse or a finger.

3aEasy1 mark

What is the upper bound of a value rounded to the nearest 10?

3bEasy1 mark

What is the lower bound of 3.4 rounded to 1 decimal place?

4aEasy1 mark

Why estimate before calculating?

5aEasy1 mark

How do bounds combine in multiplication of positive values?

5bEasy1 mark

What is a sensible rounded answer?

6aMedium1 mark

Use the lesson knowledge to answer precisely: What is the upper bound of a value rounded to the nearest 10?

6bMedium1 mark

Use the lesson knowledge to answer precisely: What is the lower bound of 3.4 rounded to 1 decimal place?

7aEasy1 mark

Write 5764 correct to the nearest thousand.

Answer

7bMedium1 mark

Write 5764 correct to the nearest hundred.

Answer