Matemáticas
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Calcula.<br />
2,5 x (19 – 0,5) x 10 = ______________<br />
(80 – 14) x (35 – 15) x (4,2 – 1,8) = ______________<br />
(26 – 2,2) x 4 x 3 x 5 = ______________<br />
400 + 35 – (18 – 15,2) x 100 = ______________