Question

Efetue as operações a seguir e simplifique o resultado, quando possível. A) 2/3 + 1/3. B) 4/5 + 6/5. C) 3/8 + 7/8. D) 11/12 + 4/12 + 5/12. E) 11/20 + 8/20 + 4/20. F) 5/6 + 1/6 - 2/6. G) 7/11 - 2/11 + 4/11. H) 3/15 - 1/15 + 3/15.

Por favor me ajudem!

Answer 1

Explicação passo-a-passo:

$a)\\ \\ {2\over3}+{1\over3}={{2+1\over3}={3\over3}=1$

$b)\\ \\ {4\over5}+{6\over5}={4+6\over5}={10\over5}=2\\ \\ c)\\ \\ {3\over8}+{7\over8}={3+7\over8}={10\over8}={5\over4}\\ \\ d)\\ \\ {11\over12}+{4\over12}+{5\over12}={11+4+5\over12}={20\over12}={5\over3}$

$e)\\ \\ {11\over20}+{8\over20}+{4\over20}={11+8+4\over20}={23\over20}\\ \\ f)\\ \\ {5\over6}+{1\over6}-{2\over6}={5+1-2\over6}={{4\over6}={2\over3}$

$g)\\ \\ {7\over11}-{2\over11}+{4\over11}={7-2+4\over11}={11-2\over11}={9\over11}\\ \\ h)\\ \\ {3\over15}-{1\over15}+{3\over15}={3-1+3\over15}={6-1\over15}={5\over15}={1\over3}$