April 2019 1 109 Report
Escriban los paréntesis necesarios para obtener el resultado que se muestra en cada expresión.

a) 3 × 5 + 3 – 2 × 7 + 1 = 11
b) 3 × 5 + 3 – 2 × 7 + 1 = 23
c) 3 × 5 + 3 – 2 × 7 + 1 = 8
d) 3 × 5 + 3 – 2 × 7 + 1 = 3
e) 3 × 5 + 3 – 2 × 7 + 1 = 5
f) 3 × 5 + 3 – 2 × 7 + 1 = 144

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