Page 17 - 新思维数学学生用书4 样章
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1 Numbers and the number system
Exercise 1.2
1 Look at the number line.
−10 −9 −8 −7 −6 −5 −4 −3 −2 −1 0 1 2 3 4 5 6 7 8 9 10
Write where you would land on the number line after these moves.
a start count on b start count back
−5 1 −2 4
c start count on d start count back
−3 3 6 9
2 Here is a number line.
A B C D
−6 0 6
a Which numbers do the arrows A, B, C and D point to?
b Which letter shows the position of a number greater
than −4 and less than 0?
3 Look at this thermometer.
What numbers are the arrows pointing to at a, b and c?
−10 0 10 20 30 40°C
a b c
Tip
4 Which temperature is the coldest? Use the
−6 °C 0 °C 1 °C −2 °C
thermometer
in question 3
to help you.
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