Question

cerinta la exercitiu : Aplica proprietetile inmultiri pentru a calcula rapid ;
5x46+5x54=
6x127+6x73=
7x428-7x128=
3x317-3x67=

ajutati-ma va rog plss :

Answer 1

5(46+54)=5x100=500
6(127+73)=6x200=1200
7(428-128)=7x300=2100
3(317-67)=3x250=750
dai factor comun

Answer 2

5*46+5*54=5(46+54)=5*100=500

6*127+6*73=6(127+63)=6*200=1200

7*428-7*128=7(428-128)=7*300=2100

3*317-3*67=3(317-67)=3*250=750