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Having learned abacus formulas, it's time to show off your skills in solving number problems. When you feel comfortable working on three and six 3-digit numbers, you should move on to eight and ten 3-digit arithmetic. " How to Abacus Exercise" has more exercise books waiting for you to practice: 2 digits 34, 2 digits 567, 2 digits 810, 3 digits 36 and 3 digits 810. Check them all out
- Format: Häftad
- ISBN: 9781949622140
- Språk: Engelska
- Antal sidor: 50
- Utgivningsdatum: 2019-10-01
- Förlag: Pingrow Media