Question

15,94-15 intreg si 9/11

Answer 1

$15,94-15\dfrac{9}{11} =\\ \\ = 15,94-\Big(15+\dfrac{9}{11}\Big) = \\ \\ =15,94-15-\dfrac{9}{11} = \\ \\ =0,94-\dfrac{9}{11} = \\ \\= \dfrac{94}{100}-\dfrac{9}{11} = \\ \\ = \dfrac{94\cdot 11}{100\cdot 11}-\dfrac{94\cdot 100}{11\cdot 100} = \\ \\\\ = \dfrac{94\cdot 11-9\cdot 100}{100\cdot11} = \\ \\ = \dfrac{134}{1100} = \\ \\ = 0,12(18)$

Answer 2

15.94 - 15*(9/11)=

=1594/100-174/11

=(17534-17400)/1100

=134/1100

=0.12(18)