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Max8115
a fost răspuns

calculeaza in doua moduri. 8×(23+14)=?, (123+23)×3=?, (120-16)×4=?, 5×(325-250)=?,(42+18)×16=?, 11×(32-15)=?,15×(84-29)=?. dau coroana . te rog ajutatima

Răspuns :

8 × ( 23 + 14 ) = 8 × 37 = 296 → primul mod

= 8 × 23 + 8 × 14 = 184 + 112 = 296 → al doilea mod

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( 123 + 23 ) × 3 = 146 × 3 = 438

= 123 × 3 + 23 × 3 = 369 + 69 = 438

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( 120 - 16 ) × 4 = 104 × 4 = 416 → primul mod

= 120 × 4 - 16 × 4 = 480 - 64 = 416 → al doilea mod

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5 × ( 325 - 250 ) = 5 × 75 = 375

= 5 × 325 - 5 × 250 = 1 625 - 1 250 = 375

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( 42 + 18 ) × 16 = 60 × 16 = 960

= 42 × 16 + 18 × 16 = 672 + 288 = 960

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11 × ( 32 - 15 ) = 11 × 17 = 187

= 11 × 32 - 11 × 15 = 352 - 165 = 187

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15 × ( 84 - 29 ) = 15 × 55 = 825 → primul mod

= 15 × 84 - 15 × 29 = 1 260 - 435 = 825 → al doilea mod