Question

КТО ЗНАЕТ МАТЕМАТИКУ 6 КЛАСС СДЕЛАЙТЕ ​

Answer 1

1. -28*7= - 4

8*-9= -72

-4+ -72= -79

-76+63= -13

2. 4*(-7)= -27

-33-(-28)= -5

20/(-5)=-4

-4-47=-51

3. 66+58=124

124-13=111

111:7=15 6/7

15 6/7*(-10)=-1110/7=-158 4/7

2 задание

$\frac{5}{24} \times ( - 2.7) = - \frac{135}{240} = - \frac{9 \times 15}{16 \times 15} = - \frac{9}{16}$

$- \frac{9}{16} + ( - \frac{11}{16} ) = \frac{ - 9 - 11}{16} = - \frac{20}{16} = - \frac{5 \times 4 }{4 \times 4} = - 1 \frac{1}{4}$

$\frac{5}{24} \times ( - 3.3) = - \frac{165}{204} = - \frac{11 \times 15}{15 \times 16} = - \frac{11}{16}$

2.)

$- 3 \frac{1}{3} - 1 \frac{1}{6} = - \frac{10}{3} - \frac{7}{6} = \frac{ - 2 \times 10 - 7}{6} = - \frac{27}{6} = - \frac{9 \times 3}{2 \times 3} = - 4\frac{1}{2}$

$- 4 \frac{1}{2} \times 0.2 = - \frac{18}{20} = - \frac{9 \times 2}{10 \times 2} = - \frac{9}{10}$

$- 0.3 \div \frac{1}{3} = - \frac{9}{10} = - \frac{9}{10}$

$- \frac{9}{10} - ( - \frac{9}{10} ) = \frac{ - 9 + 9}{10} = 0$