October 2019 1 41 Report
1. Calcular: S= 2+10+18+26+...(30 sumandos
2. En la siguiente sustracción: 234-98=136, si al sustraendo se le resta 25 y al minuendo se le agrega 54, ¿cuál es la nueva diferencia?
3. Hallar: CA(CA(CA(...(CA(98742...))) }1081 veces
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