數學習作 64之71頁 (1) 3+5 = 5+3 5+1 = 6 5+2 = 7 5+3 = 8 (2) 10-4 = 10-1 = 9 10-2 = 8 10-3 = 7 10-4 = 6 (3) 4+3 = 4+1 = 5 4+2 = 6 4+3 = 7 (4) 9-2 = 9-1 = 8 9-2 = 7 (1) 3+5 = 5+3 = 5+1 = 6 5+2 = 7 5+3 = 8 (2) 6+3 = 6+1 = 7 6+2 = 8 6+3 = 9 (3) 4+2 = 4+1 = 5 4+2 = 6 (1) 4+5 = 5+4 = 5+1 = 6 5+2 = 7 5+3 = 8 5+4 = 9 (2) 3+4 = 4+3 = 4+1 = 5 4+2 = 6 4+3 = 7 (3) 9+1 = 10 (1) 7-4 = 7-1 = 6 7-2 = 5 7-3 = 4 7-4 = 3 (2) 9-2 = 9-1 = 8 9-2 = 7 (3) 10-6 = 10-1 = 9 10-2 = 8 10-3 = 7 10-4 = 6 10-5 = 5 10-6 = 4 (1) 3+9 = 9+3 = 9+1 = 10 9+2 = 11 9+3 = 12 (2) 7+7 = 7+1 = 8 7+2 = 9 7+3 = 10 7+4 = 11 7+5 = 12 7+6 = 13 7+7 = 14 (3) 11+6 = 11+1 = 12 11+2 = 13 11+3 = 14 11+4 = 15 11+5 = 16 11+6 = 17 (1) 14-2 = 14-1 = 13 14-2 = 12 (2) 18-7 = 18-1 = 17 18-2 = 16 18-3 = 15 18-4 = 14 18-5 = 13 18-6 = 12 18-7 = 11 (3) 13-6 = 13-1 = 12 13-2 = 11 13-3 = 10 13-4 = 9 13-5 = 8 13-6 = 7 (4) 16-7 = 16-1 = 15 16-2 = 14 16-3 = 13 16-4 = 12 16-5 = 11 16-6 = 10 16-7 = 9 (1) 12+5 = 12+1 = 13 12+2 = 14 12+3 = 15 12+4 = 16 12+5 = 17 (2) 13-9 = 13-1 = 12 13-2 = 11 13-3 = 10 13-4 = 9 13-5 = 8 13-6 = 7 13-7 = 6 13-8 = 5 13-9 = 4 (3) 18-7 = 18-1 = 17 18-2 = 16 18-3 = 15 18-4 = 14 18-5 = 13 18-6 = 12 18-7 = 11 (1) 8-5 = 8-1= 7 8-2= 6 8-3 = 5 8-4 = 4 8-5 = 3 (2) 14-5 = 14-1 = 13 14-2 = 12 14-3 = 11 14-4 = 10 14-5 = 9 (3) 10-10 = 10-1 = 9 10-2 = 8 10-3 = 7 10-4 = 6 10-5 = 5 10-6 = 4 10-7 = 3 10-8 = 2 10-9 = 1 10-10 = 0 |
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