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Numbers review

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  • 20-10:
    10 ten
  • 30+30:
    60 sixty
  • 25+25:
    50 fifty
  • 15+15:
    30 thirty
  • 50+50:
    100 one hundred
  • 100-10:
    90 ninety
  • 10+10:
    20 twenty
  • 20+20:
    40 forty
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