Page 154 - NUMINO Challenge_B1

Geometry 3 5 9 10 14 15 53

7 Moving Figures p.60~p.61 Problem solving

Example does not change ,, 1 12 345 12 345
6 7 8 9 10
rotated, , 6 7 8 9 10 11 12 13 14 15
11 12 13 14 15 16 17 18 19 20
16 17 18 19 20 21 22 23 24 25
21 22 23 24 25

Try It Again 1 2 7 9 12 13 14 19 24 25 126

rotate or 2 The transparent film sheets can be overlapped,
rotate
as shown below, to produce the most, and least

number of colored cells.

flip Most

Example mirror 14

Least

, 7

Type 7-1 Overlapping Cellophane Papers p.62~p.63 Type 7-2 Placing a Mirror Perpendicularly on a Figure p.64~p.65
1
1 When the cellophane paper is flipped to the
right over line A, the paper is reversed from left 2
to right. The numbers covered by the cellophane 3 ,,,,
paper become 2, 3, 7, 8, and 12.

123 4
567 8
9 10 11 12
13 14 15 16

A

2 When the cellophane paper is rotated 180
degrees about point B, the left and right, top
and bottom side will be reversed. The numbers
covered by the cellophane paper become 15,
14, 10, 9, and 5.

123 4
564 8
9 10 11 12
13 14 15 16

Answer Key