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Erica used friendly numbers to find 43-19 she added 1 to 19 and subtracted 1 from 43 what is Erica's error
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Erica used friendly numbers to find 43-19 she added 1 to 19 and subtracted 1 from 43 what is Erica's error

User Jammie
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2 Answers

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42-20=22 ---- I'm pretty sure that's the answer you're looking for.
User Sangram Parmar
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4 votes
Her error was that she subtracted from the 43 when she should have added also to the 43 by 1 number. 44-20=24 hope this helps
User Abudayah
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