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calculati:
a)2020*109 - 2010*109 + 10*891

b)328*345 - 300*345 + 28*655​


Răspuns :

coronita te ROG................

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2020 × 109 - 2010 × 109 +10 × 891

109 ( 2020 - 2010 ) + 8910

109 × 10 + 8910

1090 + 8910 = 10000

328 × 345 - 300 × 345 + 28 × 655

345 ( 328 - 300 ) + 18340

345 × 28 + 18340

9660 + 18340 = 28000