Question

Номер 1249 . Помогите пожалуйста !!!

Answer 1

1) 0.4*1.5 - 1.9*(-0.7) = 0.6 + 1.33 = 1.93

2) 0.4*(-2.3) - 1.9*4.2 = -0.92 - 7.98 = -8.9

3) 0.4*$frac{2}{3}$ - 1.9*0 = $frac{4}{15}$

4) 0.4*1 - 1.9*(-1) = 0.4 + 1.9 = 2.3

5) 0.4*$frac{1}{2}$ - 1.9*$frac{1}{3}$ = $frac{1}{5} - frac{19}{30} = frac{6-19}{30} = -frac{13}{30}$

6) 0.4*$(- frac{2}{5} ) - 1.9*( - frac{2}{5} )= -frac{4}{25}- frac{19}{25} = frac{23}{25}$