Create better lessons quicker
Коригиране на: 10+30=40, 20+30=50, 40-20=20, 50+50=100, 80-30=50, 50+40=90, 90-20=70, 40+30=70, 100-60=40, 50-50=0, 100-90=10, 30+60=90, 40+60=100, 80-60=20, 90-10=80, Неправилен: 10+30=50, 20+30=60, 40-20=10, 50+50=90, 80-30=60, 50+40=80, 90-20=60, 40+30=80, 100-60=30, 50-50=10, 100-90=20, 30+60=80, 40+60=90, 80-60=10, 90-10=100,

Събиране и изваждане до 100 по десетици

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