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Lucia knows 2×5 but doesn't know 2×7. How could Sonia use 2×5 to find 2×7?

Lucia knows 2×5 but doesn't know 2×7. How could Sonia use 2×5 to find 2×7?
asked 33.5k views
3 votes
Lucia knows 2×5 but doesn't know 2×7. How could Sonia use 2×5 to find 2×7?

asked
User Ryanlahue
by
8.0k points

1 Answer

5 votes
sonia can calculate that 2x5=10,
2x2=4
4+10=14
answered
User Orolo
by
8.2k points
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