Seudónimo Seudónimo
  • 28-10-2016
  • Mathematics
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Lucia knows 2×5 but doesn't know 2×7. How could Sonia use 2×5 to find 2×7?

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CuriousCompass
CuriousCompass CuriousCompass
  • 28-10-2016
sonia can calculate that 2x5=10,
2x2=4
4+10=14
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