Question

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4 1/6 * (0,625-1,64:1,6)

Answer 1

$4 \frac{1}{6} \times (0.625 - 1.64 \div 1.6) = 4 \frac{1}{6} \times ( \frac{25}{4} - \frac{41}{25} \times \frac{5}{8} ) = \frac{25}{6} \times ( \frac{25}{4} - \frac{41}{40} ) = \frac{25}{6} \times \frac{209}{40} = \frac{5 \times 209}{48} = \frac{1045}{48} = 21 \frac{43}{48}$

Answer 2

1) 1,64:1,6=1⁶⁴/₁₀₀:1⁶/₁₀=1¹⁶/₂₅:1³/₅=(41/25):(8/5)=41*5/(25*8)=41/40.

2) 0,625-(41/40)=(625/1000)-(41/40)=(25/40)-(41/40)=-16/40=-2/5.

3) 4¹/₆*(-2/5)=(25/6)*(-2/5)=-25*2/(6*5)=-5/3.