(Раціональні числа, 6 клас) а)-8×36×5 б) [tex]\frac{4}{7} * (9,24) - \frac{4}{7} * (-2,27)[/tex] в) [tex]\frac{5}{8} * (-\frac{7}{16}) * (-2\frac{2}{3}) * (-1\frac{1}{7})[/tex] г) [tex](-\frac{5}{8} + \frac{4}{9}) * 7,2[/tex] д) [tex](-2,6)^{2} - (-3,2) * (-\frac{3}{8}) + (-6,56)[/tex]
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-8 *36 *5= - 14404/7 * 9,24 - 4/7 *(-2,27)=4/7*(9,24+2,27)=4/7*11,51=4/7*1151/100=1151/175=6 101/175
5/8 * ( -7/16)*(-2 2/3)*(-1 1/7)= - 5/8 * 7/16 * 8/3 * 8/7= - 5/6
( -5/8+4/9) * 7,2=(-45/72+32/72) *7,2= - 13/72 * 72/10= - 13/10= -1 3/10= - 1,3
(-2,6)² - (-3,2)*( -3/8)+(-6,56)= 6,76 - 32/10*3/8 - 6,56=0,2 - 12/10=0,2 -1,2= - 1