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a fost răspuns

calculeaza dupa model 1000-547+10)-(500+40+7)=(900-500)+(90-40)+(10-7)=400+50+3=453 ; 100-382; 1000-273;1000-561;1000-928

Răspuns :

primul exercitiu cred ca este
1000-382= (900-300)+(90-80)+(10-2)=600+10+8=618
1000-273=(900-200)+(90-70)+(10-3)=700+20+7=727
1000-561=(900-500)+(90-60)+(10-1)=400+30+9=439
1000-928=(900-900)+(90-20)+(10-8)=0+70+2=72

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