| | | | | | | | | | | | | | | | | 1. | | | | | | | | | | | | 2. | | | | | | | | | 23-8 | | 1 23-1-1-1-1-1-1-1-1=15 | 2 23-3=20,20-5=15 | 3 23-10=13,13+2=15 | 4 13-8=5,10+5=15 | 5 10-8=2,13+2=15 | 6 23-13=10,10+5=15 | 7 23-5=18,18-3=15 | | | 3. | | | | | | | | 4. | | | | | | | | | | | | | | 5. | | | | | | | | | | | 1. | | | | | | | 9 | 9+7 7 1 6 | 9 1 10+6=16 | | 1 | | | | | | | | 2 | | | | | 125 32 32 8 4 | | 125 8=1000 | | 125 32=125 8 4=1000 4=4000 | | | | | 2. | | | | | | 1 | | | 3~5 | 100 | 12 13 | 14 15 16 2 9 25 4 25 8 125 8 | 2 16 25 36 | | 2 | 30+7+6 30+ 7+6 ,15-9-2 15- | 9-2 | 80+3,80+30,63-20, | 63-2 | | 3 | | | | | | | | 3. | | 1 | | | | | | | 2 | | | | | | | | | | | | | | | | | | 4. | | | | | | | | | | | | | | | | | | | | | | | | 2020 10 | | |