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학교 방탈출
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Elementary 4-1
Mathematics

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7 questions

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# 1Short Answer
23+100=123 34+200=234 45+300=345 56+400=456 ( )
67+500=567
# 2Short Answer
500+100=600 400+200=600 300+300=600 200+400=600 ( )
100+500=600
# 3Short Answer
1000+9999=10999 2000+8888=10888 3000+7777=10777 ( )
4000+6666=10666
# 4Short Answer
1001+9999=11000 2002+9999=12001 3003+9999=13002 ( )
4004+9999=14003
# 5Short Answer
1010+2020=3030 2020+3030=5050 3030+4040=7070 ( )
4040+5050=9090
# 6Short Answer
8765+1234=9999 7654+1234=8888 6543+1234=7777 5432+1234=6666 ( )
4321+1234=5555
# 7Short Answer
7500-2000=5500 6500-2000=4500 5500-2000=3500 ( )
4500-2000=2500
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