Page 13 - 新思维数学学生用书4 样章
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1 Numbers and the number system
2 Copy and complete this square using the rule ‘add 2 across and add 2
down’.
What do you notice about the numbers on the diagonal?
Discuss with your partner.
+2
+2 1
Draw two more 5 by 5 squares and choose a rule using addition.
Predict what the numbers on the diagonal will be before you
complete the squares.
3 Choose any two of these three sequences.
How are they similar to each other and how are they different?
2, 4, 6, 8, . . . 2, 5, 8, 11, . . . 3, 5, 7, 9, . . .
4 Look at these sequences.
Which could be the odd one out? Explain your answer.
13, 16, 19, 22, . . . 8, 11, 14, 17, . . . −5, −2, 1, 4, . . .
9, 12, 15, 18, . . . 16, 19, 22, 25, . . .
Think about your answers to questions 3 and 4.
Are there other possible answers?
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