Question

0,254 ∙ 84 б) (27 ∙ 3−5 ∙ 9:3−4):30 в) (32∙4-4)2 СРОЧНООООООООООО​

Answer 1

0,254 ∙ 84 =21,336

б) (27 ∙ 3−5 ∙ 9:3−4):30 =(81-15-4):30=62:30=2 1/15

в) (32∙4-4)2=(128-4)*2=124*2=248

Answer 2

Ответ:

ответ в объяснении

Объяснение:

а)0.254•84=254•84/1000=21336/1000=21,336

б)=(81-15-4)/30=62/30=2,1/15

в)(128-4)•2=124•2=248

Answer 3

Let's solve each expression step by step:

а) $0.254 \times 84$

• Multiply 0.254 by 84.

$0.254 \times 84 = 21.336$

б) $(27 \times 3^{-5} \times \frac{9}{3^{-4}}) \div 30$

• Evaluate the exponentials and the fraction, and then divide by 30.

$(27 \times 3^{-5} \times \frac{9}{3^{-4}}) \div 30 = (27 \times 3^{-5} \times 9 \times 3^4) \div 30$ $= \frac{27 \times 9}{10} = \frac{243}{10}$

в) $(32 \times 4 - 4)^2$

• Perform the operations inside the parentheses, and then square the result.

$(32 \times 4 - 4)^2 = (128 - 4)^2 = 124^2$ $= 15,376$

So, the results are:

• а) $21.336$
• б) $\frac{243}{10}$ or $24.3$ (if you prefer a decimal)
• в) $15,376$