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Calculati rapid : 234 la puterea a 2-a - 234 x 133
213 x 992 + 213 x 8

Dau coroana!


Răspuns :

(234x234)-234x133=54756-31122=23634

234x(234-133)=234x101=23634

213x992+213x8=211296+1704=213000

213x(992+8)=213x1000=213000
234² - 234·133 = 

= 234
·234 - 234·133

= 234(234 - 133)

= 234·101

= 23634


213·992 +213·8 =

= 213(992 + 8)

= 213·1000

= 213000