Question

593 сРОЧНО даю 20балов

Answer 1

Ответ:

Пошаговое объяснение:

1. (4/9 -11/15 +2/3)÷3 2/5+2/9=1/3

1.1. 4/9 -11/15 +2/3=20/45 -33/45 +30/45=17/45

1.2. 17/45 ÷3 2/5=17/45 ·5/17=1/9

1.3. 1/9 +2/9=3/9=1/3

2. 5÷(-1,25)+2,8·1/7 +1/3=-3 4/15

2.1. 5÷(-1,25)=5÷(-5/4)=5·(-4/5)=-4

2.2. 2,8·1/7=14/5 ·1/7=2/5

2.3. -4 +2/5 +1/3=-3 15/15 +6/15 +5/15=-3 4/15

3. (4 2/7 ÷3 3/14 -8+4 6/11)·3=-6 4/11

3.1. 4 2/7 ÷3 3/14=30/7 ·14/45=(2·2)/3=4/3=1 1/3

3.2. 1 1/3 -8+4 6/11=1 11/33-7 33/33+4 18/33=-2 4/33

3.3. -2 4/33 ·3=-70/33 ·3=-70/11=-6 4/11

4. 9,8÷(10-3 7/15)·1 1/27=1 5/9

4.1. 10-3 7/15=9 15/15-3 7/15=6 8/15

4.2. 9,8÷6 8/15=49/5 ·15/98=3/2

4.3. 3/2·1 1/27=3/2 ·28/27=14/9=1 5/9