Răspuns:
Explicație pas cu pas:
a) 23×345+23×172=7935+3956=11891
sau 23(345+172)=23×517=11891
b)15×42+15×18=630+27=900
sau 15(42+18)=15×60=900
c) 233×51+93×51=11883+4743=16626
sau 51(233+93)=51×326=16626
Răspuns:
[tex]23 \times 345 - 23 \times 172 = 23(345 - 172) = 23 \times 173 = 3979 \\ 23 \times 345 - 23 \times 172 = 7935 - 3956 = 3979 \\ 15 \times 42 + 15 \times 18 = 15(42 + 18) = 15 \times 60 = 900 \\ 15 \times 42 + 15 \times 18 = 630 + 270 = 900 \\ 233 \times 51 + 93 \times 51 = 51(233 + 93) = 51 \times 326 = 16626 \\ 233 \times 51 + 93 \times 51 = 11883 + 4743 = 1626[/tex]
