Question

(nu am mai putut gandi pentru ca am avut de vopsit pene pe maine)

Rezolva in doua moduri:

9×140+9×517; 15×68+76×15; 730×6-6×219; 18×59-18×43

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Answer 1

Răspuns:

var 1 : 9×140+9×517=1260+4653=5913

var 2: 9×140+9×517=9×(140+517)=9×657=5913

var 1 : 15×68+76×15=1020+1140=2160

var 2: 15×68+76×15=15×(68+76)=15×144=2160

var 1 : 730×6-6×219=4380-1314=3066

var 2: 730×6-6×219=6×(730-219)=6×511=3066

var 1 : 18×59-18×43=1008-774=234

var 2: 18×59-18×43=18×(59-43)=18×16=234