INICIO

SUMAS Y RESTAS NIVEL 1 ; A,B,C = NUMEROS (1 A 10)
(A) + (B)	(A) - (B)	- (A) + (B)	- (A) - (B)	(A) + (B) + (C)	(A) + (B) - (C)	- (A) - (B) + (C)	- (A) - (B) - (C)
SUMAS Y RESTAS NIVEL 2 ; A,B,C,D = NUMEROS (1 A 10)
(A - B) + (C - D)		- (A + B) - (C + D)		(- A + B) + (- C + D)	- (A - B) + (C - D)	- (A - B) - (- C + D)	- ( - A - B) - ( - C - D)
SUMAS Y RESTAS NIVEL 3 ; A,B,C,D = NUMEROS (1 A 20)
(A) + (B)	(A) - (B)	- (A) + (B)	- (A) - (B)	(A) + (B) + (C)	(A) + (B) - (C)	- (A) - (B) + (C)	- (A) - (B) - (C)
SUMAS Y RESTAS NIVEL 4 ; A,B,C,D = NUMEROS (1 A 20)
(A - B) + (C - D)		- (A + B) - (C + D)		(- A + B) + (- C + D)	- (A - B) + (C - D)	- (A - B) - (- C + D)	- ( - A - B) - ( - C - D)
SUMAS Y RESTAS NIVEL 9 ; A,B,C,D = NUMEROS (1 A 100)
(A) + (B)	(A) - (B)	- (A) + (B)	- (A) - (B)	(A) + (B) + (C)	(A) + (B) - (C)	- (A) - (B) + (C)	- (A) - (B) - (C)
SUMAS Y RESTAS NIVEL 10 ; A,B,C,D = NUMEROS (1 A 100)
(A - B) + (C - D)		- (A + B) - (C + D)		(- A + B) + (- C + D)	- (A - B) + (C - D)	- (A - B) - (- C + D)	- ( - A - B) - ( - C - D)