Question

Rezolvă exercițiile:
a) 225 x 40 - 321 x 20 = (154 x 25 - 3675) x 24 =
456 x 13 + 215 x 18 =
(216 x 28 - 5 859) x 42 =
763 x 13 - 405 x 23 =
(145 x 24 + 3 520): 100 x 48 =
204 x 11 + 386 x 13 =
(359 x 27 + 307): 100 x 67= ​

Answer 1

Explicație pas cu pas:

a) 225×40-321×20=(154×25-3675)×24= 9000-6420=(3850-3675)= 2580=175

456×13+215×18=5928+3870=9798

(216×18-5859)×42= (3888-5859)×42=-1971×42=-82782

763×13-405×23=9919-9315=604

(145×24+3520):100×48=(3480+3520):100×48=7360:100×48=73,6×48=3532,6

204×11+386×13=2244+5018=7262

(359×27+307):100×67=(9693+307):100×67=10000:100×67=100×67=6700