Tính : a, – 14 /145 . 29/3 b, -5/28. 28/15 c, 11/12 . -21/16 d, 7 + 39/25 e, 7/15 . 3/5

30/04/2023

1 bình luận về “Tính : a, – 14 /145 . 29/3 b, -5/28. 28/15 c, 11/12 . -21/16 d, 7 + 39/25 e, 7/15 . 3/5</p”

1. a) (-14)/145 * 29/3 = ((-14). 29)/(145.3) = (-406)/435 = (-14)/15

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   b) (-5)/28 * 28/5 = ((-5). 28)/(28.15) = (-140)/420 = (-1)/3

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   c) 11/12 * (-21)/16 = (11.(-21))/(12.16) = (-231)/192 = (-77)/64

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   d) 7 + 39/25 = 175/25 + 39/25 = (175+39)/25 = 214/25

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   e) 7/15 * 3/5 = (7.3)/(15.5) = 21/75 = 7/25

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   f) 7/25 + 10/3 = 21/75 + 250/75 = (21+250)/75 = 271/25

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