Номер 847

Обчисліть:

1) 6	4	+ 3	5	= 9	9	= 10;
	9		9		9

2) 10	11	+ 5	14	= 15	25	= 16	6	;
	19		19		19		19

3) 1	5	+ 3	7	= 4	12	= 5	4	= 5	1	;
	8		8		8		8		2

4) 1 –	3	=	11	–	3	=	8	;
	11		11		11		11

5) 1 –	13	=	40 – 13	=	27	;
	40		40		40

6) 4 – 1	4	= 3	7	– 1	4	= 2	3	;
	7		7		7		7

7) 10 – 9	3	= 9	10	– 9	3	=	7	;
	10		10		10		10

8) 5	2	– 2	5	= 4	9	– 2	5	= 2	4	;
	7		7		7		7		7

9) 14	6	– 8	12	= 13	26	– 8	12	= 5	14	= 5	7	;
	20		20		20		20		20		10

10) 8	3	– 5	9	= 7	17	– 5	9	= 2	12	= 2	6	;
	14		14		14		14		14		7

11) 7	10	– 4	16	= 6	31	– 4	16	= 2	15	= 2	5	;
	21		21		21		21		21		7

12) 14	8	– 6	8	= 8.
	31		31