Question

calculeaza in doua moduri (15+9)•10,100•(23+341,1000•(21+314,(543-207)•100,(905-327)•1000,100•(9230-8103)

Answer 1

( 15 + 9 ) × 10 = 24 × 10 = 240 → primul mod

= 15 × 10 + 9 × 10 = 150 + 90 = 240 → al doilea mod

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100 × ( 23 + 341 ) = 100 × 364 = 36 400 → primul mod

= 100 × 23 + 100 × 341 = 2 300 + 34 100 = 36 400 → al doilea mod

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1 000 × ( 21 + 314 ) = 1 000 × 335 = 335 000 → primul mod

= 1 000 × 21 + 1 000 × 314 = 21 000 + 314 000 = 335 000 → al II-lea mod

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( 543 - 207 ) × 100 = 336 × 100 = 33 600 → primul mod

= 543 × 100 - 207 × 100 = 54 300 - 20 700 = 33 600 → al doilea mod

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( 905 - 327 ) × 1 000 = 578 × 1 000 = 578 000 → primul mod

= 905 × 1 000 - 327 × 1 000 = 905 000 - 327 000 = 578 000 al doilea mod

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100 × ( 9 230 - 8 103 ) = 100 ×1 127 = 112 700 → primul mod

= 100 × 9 230 - 100 × 8 103 = 923 000 - 810 300 = 112 700 → al doilea mod