Page 7 - 新思维数学活动用书4 样章
P. 7
1 Numbers and
the number system
1.1 Counting and sequences
Worked example 1
The numbers in this sequence increase by 30 each time.
10, 40, 70, . . .
The sequence continues in the same way.
Which number in the sequence is closest to 200?
List the terms in the sequence.
The next terms in the sequence are:
+30 +30 +30 +30 +30 +30 +30
10 40 70 100 130 160 190 220
200
Work out which term is
190 220 closest to 200.
Answer: 190 is closest to 200.
difference linear sequence negative number
non-linear sequence rule sequence spatial pattern
square number term term-to-term rule
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