Page 31 - 新思维数学活动用书6 样章
P. 31
2 Numbers and sequences
Exercise 2.3
Focus
1 The multiples of 9 are shaded on the hundred square.
1 2 3 4 5 6 7 8 9 10
11 12 13 14 15 16 17 18 19 20
21 22 23 24 25 26 27 28 29 30
31 32 33 34 35 36 37 38 39 40
41 42 43 44 45 46 47 48 49 50
51 52 53 54 55 56 57 58 59 60
61 62 63 64 65 66 67 68 69 70
71 72 73 74 75 76 77 78 79 80
81 82 83 84 85 86 87 88 89 90
91 92 93 94 95 96 97 98 99 100
a Draw a ring around all the multiples of 5.
b List the common multiples of 5 and 9.
2 Sofia is thinking of a number.
My number is a
multiple of 2. My number
is a multiple of 7.
30
