Question

calculați valoarea expresiei : (-2 pe 11 *5,5-1, 2²) :0, 4​

Answer 1

$( - \frac{2}{11} \times 5.5 - {1.2}^{2} ) \div 0.4 = \\ ( - \frac{2}{11} \times \frac{55}{10} - \frac{ {12}^{2} }{ {10}^{2} } ) \div \frac{4}{10} = \\ ( - \frac{1}{1} \times \frac{5}{5} - \frac{144}{100} ) \times \frac{10}{4} = \\ ( - 1 - 1.44) \times \frac{10}{4} = \\ - 2.44 \times \frac{10}{4} = \\ - \frac{24.4}{4} =- \frac{6.1}{1} = - \frac{61}{10}$

Answer 2

Răspuns:

(-2 pe 11 *5,5-1, 2²) :0, 4​= (-2/11·55/10-1,44):0,4=

(-1-1,44):0,4=-2,44:0,4= -6,1