Question

Va rog e o urgenta! Calculeaza in doua moduri: (15+9)x10 , 100x(23+341) , 1.000x(21+314) , (543-207)x100 , (905-327)x1.000 , 100x(9.230-8.103)

Answer 1

9×10+15,100+345×23,1000+314×21,543×100-207,1000-905×327,

Answer 2

(15+9)*10=24*10=240
15*10+9*10=150+90=240

100*(23+341)=100*364=36400
100*23+100*341=2300+34100=36400

1000*(21+314)=1000*335=335000
1000*21+1000*314=21000+314000=335000

(543-207)*100=336*100=33600
543*100-207*100=54300-20700=33600

(905-327)*1000=578*1000=578000
905*1000-327*1000=905000-327000=578000

100*(9230-8103)=100*1127=112700
100*9230-100*8103=923000-810300=112700