Решите примеры в столбик:

а) 12:7.5+7.5:12+0.25:0.4 х (5.1-3.86)

б) 5.632:51.2+4.256:3.8 - (3-0.39:0.15)

в) (0.598+0.536) : 0.28: (0.003 х5+0.029 х15)

А) 12:7.5+7.5:12+0.25:0.4 х (5.1-3.86) =

=12:7.5+7.5:12+0.25:0.4 х1,24=

=1,6+7.5:12+0.25:0.4 х1,24=

=1,6+0,625+0.25:0.4 х1,24=

=1,6+0,625+0,625 х1,24=

=1,6+0,625+0,775=

=2,225+0,775=3

1) 5.10

-3.86

1,24

2) 12:7.5=1,6

120:75=1,6

75

450

450

0

3) 7.5:12=0,625

75:120=0,625

4) 0.25:0.4=0.625

25:40=0,625

5) 0,625

х1,24

2500

1250

625

0,77500

6) 1,6

+0,625

2,225

7) 2,225

+0,775

3,000

б) 5.632:51.2+4.256:3.8 - (3-0.39:0.15) =

=5.632:51.2+4.256:3.8 - (3-2,6) =

=5.632:51.2+4.256:3.8-0,4=

=0,11+4.256:3.8-0,4=

=0,11+1,12-0,4=

=1.23-0,4=0,83

1) 0.39:0.15=2,6

39:15=2,6

30

90

90

0

2) 3,0

-2,6

0,4

3) 5.632:51.2=0,11

56,32:512=0,11

512

512

512

0

4) 4.256:3.8=1,12

42,56:38=1,12

38

45

38

76

76

0

5) 0,11

+1,12

1,23

6) 1.23

-0,40

0,83

в) (0.598+0.536) : 0.28: (0.003 х5+0.029 х15) =

=1,134:0.28: (0.003 х5+0.029 х15) =

=1,134:0.28: (0,015+0.029 х15) =

=1,134:0.28: (0,015+0,435) =

=1,134:0.28:0,45=

=4,05:0,45=9

1) 0.598

+0.536

1,134

2) 0.003

х5

0,015

3) 0.029

х15

0145

0029

0,435

4) 0,015

0,435

0,450

5) 1,134:0.28=4,05

113,4:28=4,05

112

14

0

140

140

0

6) 4,05:0,45=9

405:45=9

405

0