Вычислить:
Сложение
смешанных дробей с одинаковыми знаменателями:
а

+ b

=
(а+b) +

Вычитание:а

- b

=
(а-b) +

1) 6

+ 3

= (6+3) +

= 9

= 102) 10

+ 5

= (10+5) +

= 15

= 16

3) 2

+ 2

= (2+2) +

= 4

= 5

4) 1

+ 3

= (1+3) +

= 4

= 4

= 5

5) 1-

=

-

=

=

6) 1-

=

-

=

=

7) 4 - 1

= 4 -

=

-

=

-

=

=

= 2

8) 10 - 9

= 10 -

=

-

=

-

=

=

9) 5

- 2

= 4

- 2

= (4-2) +

= 2

! (5

= 4 + 1

= 4 +

= 4

)10) 14

- 8

= 13

- 8

= (13-8) +

= 5

= 5

11) 8

- 5

= 7

- 5

= (7-5) +

= 2

= 2

12) 7

- 4

= 6

- 4

= (6-4) +

= 2

= 2

13) 14

- 6

= (14-6) +

= 814) (12

+ 7

) - (13

- 9

) = 16

1. 12

+ 7

= (12+7) +

= 19

= 202. 13

- 9

= 12

- 9

= (12-9) +

= 3

3. 20 - 3

= 19

- 3

= (19-3) +

= 16