1
Efectuează:
(365 X 48 - 279 x 56 - 132 x 14) x 235 - 169 x 65 =
(362 x 98 - 247 x 89 - 286 X 45) x 89 - 615 x 89 =
7489 X 75 - 564 x 38 - 274 x 29 +134 X 26) - 489 x 19 =
(167 x 98 +248 X 37 - 425 x 59) X 38-542 x 32=​