Page 39 - 新思维数学活动用书7 样章
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2 Expressions, formulae and equations
5 a Copy this number line.
12 13 14 15 16 17
Show the inequality y < 15 on the number line.
b Copy this number line. 12 13 14 15 16 17
Show the inequality y > 15 on the number line.
c Write down the inequality shown on
–4 –3 –2 –1 0 1
this number line. Use the letter x.
d Write down the inequality shown on
–5 –4 –3 –2 –1 0
this number line. Use the letter x.
Practice
6 Copy each number line and show each inequality on the number line.
a x > 8 7 8 9 10 11 b x < 6 3 4 5 6 7
c x < −3 –5 –4 –3 –2 –1 d x > 0 –1 0 1 2 3
7 Write down the inequality shown on these number lines. Use the letter x.
a b
12 13 14 15 16 30 31 32 33 34
c d
–9 –8 –7 –6 –5 –4 –3 –2 –1 0
8 Write down if A, B or C is the correct answer to each of the following.
a For the inequality h > 5, the smallest integer that h could be is:
A 4 B 5 C 6
b For the inequality j > −7, the smallest integer that j could be is:
A −8 B −7 C −6
c For the inequality k < 12, the largest integer that k could be is:
A 11 B 12 C 13
d For the inequality m < −1, the largest integer that m could be is:
A −3 B −2 C −1
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