Question

...por favor me ajudem...É para amanhã...
De o valor das expressões numéricas...nn entendi

Answer 1

A) 3/4 x (2/5 +1/2)= 3/4 x ( 4/10 + 5/10)= 3/4 x 9/10= →27/40←

B) 2/3 x 3/5 + 7/8=
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6/10 + 7/8=
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24/40 + 35/40= →°*59/40*°♪←

C) 2 – ( 3/5 x 7/8 )=
\/. \/
2/1 – 21/40=
\/
80/40 – 21/40= →59/40←

D) 3 x (5/4 – 3/8)² =
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3/1. x ( 10/8 – 3/8)² =
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3/1 x ( 7/8 )² =
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3/1 x 49/64= →147/64←

E) (4/3 – 1/2 )² + 4 =
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(8/6 – 3/6)² + 4/1 =
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( 5/3 )² + 4/1 =
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25/9 + 4/1 =
\/
25/9 + 36/9 = →61/9←

F) 1/2 x (5 – 7/2)³=
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1/2 x ( 5/1 – 7/2)³=
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1/2 x (10/2 – 7/2)³ =
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1/2 x ( 3/2)³ =
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1/2 x 27/8 = →27/16←