Question

Calculează in
două moduri:
53 x 18+ 18 x 49 =
378 x 26 - 279 x 26 =
406 x 14 + 14 x 38 =
87 x 63 - 58 x 63 =

Answer 1

Explicație pas cu pas:

a).53×18+18×49=954+882=1836

18×(53+49)=18×102=1836

b) 378×26-279×26=9828-7254=2574

26×(378-279)=26×99=2574

c) 406×14+14×38=5684+532=6216

14×(406×138)=14+444=6216

87×63-58×63=5481-3654=1827

63×(87-58) =1827

Answer 2

53×18+18×49=

(53×18)+(18×49=

378×26-279×26=

(378×26)-(279×26)=

406×14+14×38=

(406×14)+(14×38)=

87×63-58×63=

(87×63)-(58×63)=

calculezi tu singur/ă