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Автор - thebrianniz

Привести к общему знаменателю, вычеслить и выделить целую часть.

Первое:
frac{220}{128} + frac{350}{256}

Второе:
frac{300}{15} + frac{691}{4}

Третье:
frac{111}{40} + frac{561}{6}

Четвертое:
frac{35}{38} + frac{83}{81}

Ответ

Автор - mefody66

1) 220/128 + 350/256 = 220/128 + 175/128 = 395/128 = 3 11/128

2) 300/15 + 691/4 = 20 + 170 + 11/4 = 192 3/4

3) 111/40 + 561/6 = 2 31/40 + 93 3/6 = 95 31/40 + 20/40 = 95 51/40 = 96 11/40

4) 35/38 + 83/81 = (35*81+38*83)/(38*81) = 5989/3078 = 1 2911/3078

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