Question

90 pontos > Pergunta de matemática (com foto) quero o cálculo por favor
resultado a)59 sobre 30
b) 5 sobre 4

Answer 1

$A)~~~2- \dfrac{1}{3} -\left(0,2- \dfrac{1}{3} \right)\to~~~~ 2- \dfrac{1}{3} -\left(\dfrac{2}{10}- \dfrac{1}{3} \right)\to\\\\\\ 2- \dfrac{1}{3} -\left( \dfrac{6-10}{30} \right)\to~~~~ 2- \dfrac{1}{3} -\left( \dfrac{-4}{30} \right)\to~~~~ 2- \dfrac{1}{3} +\dfrac{4}{30} \to \\\\\\ \dfrac{60-10+4}{30} \to~~~ \large\boxed{\boxed{ ~\dfrac{54}{30}~}} ~\to~~ {\it Esse~~e\´~~o~~resultado~~correto. }$

$Ou~~ent\~ao:~~~~ \large\boxed{\boxed{ ~\dfrac{9}{5}~} }$





$B)~~~ \left( 2+ \dfrac{3}{2}- \dfrac{1}{3} \right) - \left( 1+ \dfrac{2}{3}+ \dfrac{1}{4} \right) \to\\\\\\ \left( \dfrac{12+9-2}{6} \right) - \left( \dfrac{12+8+3}{12} \right) \to\\\\\\ \left( \dfrac{19}{6} \right) - \left( \dfrac{23}{12} \right) \to~~~ \dfrac{38-23}{12} \to~~~ \dfrac{15}{12} \to~~ ~ \large\boxed{\boxed{~ \dfrac{5}{4}~}}$

Answer 2

Resposta:

A)

2 - 1/3 - (0,2 - 1/2)

2 - 1/3 - (1/5 - 1/2) ➡ MMC (10)

2 - 1/3 - (2-5/10)

2 - 1/3 - (-3/10)

2 - 1/3 - (- 3/10)

2 - 1/3 + 3/10 ➡ MMC (30)

60-10+9/30

59/30

B)

(2 + 3/2 - 1/3) - (1 + 2/3 + 1/4) ➡ MMC (6)

12+9-2/6 - (1 + 2/3 + 1/4)

19/6 - (1 + 2/3 + 1/4) ➡ MMC (12)

19/6 - 12+8+3/12

19/6 - 23/12 ➡ MMC (12)

38-23/12

15/12

15÷3/12÷3

5/4