Question

A) (1 1/3)-(2 1/2)
B) (-2 3/10)+(2 3/10)
C) (0,7)-(0,2)
D) (0,444...)-(-0,777...)
E) (2/3)×(-1/4)
F) (-5/3)×(-1/4)
G) (2 1/2)×(1 6/7)
H) (-0,7)×(0,5)
I) (0,4)×(-0,2)
e para amanhã não faz graça por favor
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Answer 1

Resposta:

$A)~~(1\dfrac{1}{3})-(2\dfrac{1}{2})=\\\\ \\ \dfrac{4}{3}-\dfrac{5}{2}=\dfrac{8-15}{6}=-\dfrac{7}{6}$

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$B)~~(-2\dfrac{3}{10})+(2\dfrac{3}{10})=\\ \\ \\ -\dfrac{23}{10}+\dfrac{23}{10}=\dfrac{0}{10}=0$

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$C)~~(0,7)-(0,2)=0,7-0,2=0,5$

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$D)~~~(0,444...)-(-0,777...)=\\ \\ \\ \dfrac{4}{9}-(-\dfrac{7}{9})=\\ \\ \\ \dfrac{4}{9}+\dfrac{7}{9}=\dfrac{11}{9}$

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$E~~(\dfrac{2}{3})\times(-\dfrac{1}{4})=-\dfrac{2}{12}=-\dfrac{1}{6}$

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$F)~~~(-\dfrac{5}{3})\times(-\dfrac{1}{4})=+\dfrac{5}{12}$

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$G)~~(2\dfrac{1}{2})\times(1\dfrac{6}{7})=\\ \\ \\ \dfrac{5}{2}\times\dfrac{13}{7}=\dfrac{65}{14}$

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$H)~~(-0,7)\times(0,5)=-0,35$

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$I)~~(0,4(\times(-0,2)=0,08$