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Calculeaza in doua moduri: 29 x (400-66) 46x(5x5) 8x(276+439)

Răspuns :

29 × 334 = 9686
29 × 400 - 29 × 66 = 11600 - 1914 = 9686

46 × 25 = 1150
(46 × 5) × 5 = 230 × 5 = 1150

8 × 715 = 5720
8 × 276 + 8 × 439 = 2208 + 3512 = 5720
29x334=9686   si  29x400-(29x66)=11600-1914=9686
46x25=1150      si (46x5)x5=230x5=1150 
8x715=5720     si  8x276+(2x439)=2208+3512=5720