November 2018 1 10 Report
Indica qué propiedades se utilizaron al resolver los siguientes cálculos

a) 12+3+4+10=15+14=29
b) 8 X 7 X 5 = 7 X 8 X 5 = 7 X 40 = 280
c) 6 x (20-2) = 6 x 20 - 6 x 2 = 120 - 12 = 108




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