用简便方法计算．1.7+3.98+1504750×515.73-3817+（4.27-2917）45×2.08+1.5×37.699999×77778+33333×66666；362+548×361362×548-18611×

Question

用简便方法计算．

1.7+3.98+ (1)/(50)	(47)/(50) ×51
5.73-3 (8)/(17) +（4.27-2 (9)/(17) ）	45×2.08+1.5×37.6
99999×77778+33333×66666	； (362+548×361)/(362×548-186)
(1)/(1×4) + (1)/(4×7) + (1)/(7×10) +…+ (1)/(97×100)	(1)/(2) + (1)/(4) + (1)/(8) + (1)/(16) + (1)/(32) ．

用简便方法计算．

1.7+3.98+ (1)/(50)	(47)/(50) ×51
5.73-3 (8)/(17) +（4.27-2 (9)/(17) ）	45×2.08+1.5×37.6
99999×77778+33333×66666	； (362+548×361)/(362×548-186)
(1)/(1×4) + (1)/(4×7) + (1)/(7×10) +…+ (1)/(97×100)	(1)/(2) + (1)/(4) + (1)/(8) + (1)/(16) + (1)/(32) ．

用简便方法计算．

1.7+3.98+ (1)/(50)	(47)/(50) ×51
5.73-3 (8)/(17) +（4.27-2 (9)/(17) ）	45×2.08+1.5×37.6
99999×77778+33333×66666	； (362+548×361)/(362×548-186)
(1)/(1×4) + (1)/(4×7) + (1)/(7×10) +…+ (1)/(97×100)	(1)/(2) + (1)/(4) + (1)/(8) + (1)/(16) + (1)/(32) ．

用简便方法计算．

1.7+3.98+ (1)/(50)	(47)/(50) ×51
5.73-3 (8)/(17) +（4.27-2 (9)/(17) ）	45×2.08+1.5×37.6
99999×77778+33333×66666	； (362+548×361)/(362×548-186)
(1)/(1×4) + (1)/(4×7) + (1)/(7×10) +…+ (1)/(97×100)	(1)/(2) + (1)/(4) + (1)/(8) + (1)/(16) + (1)/(32) ．

用简便方法计算．

1.7+3.98+ (1)/(50)	(47)/(50) ×51
5.73-3 (8)/(17) +（4.27-2 (9)/(17) ）	45×2.08+1.5×37.6
99999×77778+33333×66666	； (362+548×361)/(362×548-186)
(1)/(1×4) + (1)/(4×7) + (1)/(7×10) +…+ (1)/(97×100)	(1)/(2) + (1)/(4) + (1)/(8) + (1)/(16) + (1)/(32) ．

1.7+3.98+ (1)/(50)	(47)/(50) ×51
5.73-3 (8)/(17) +（4.27-2 (9)/(17) ）	45×2.08+1.5×37.6
99999×77778+33333×66666	； (362+548×361)/(362×548-186)
(1)/(1×4) + (1)/(4×7) + (1)/(7×10) +…+ (1)/(97×100)	(1)/(2) + (1)/(4) + (1)/(8) + (1)/(16) + (1)/(32) ．

1.7+3.98+ (1)/(50) (47)/(50) ×51 5.73-3 (8)/(17) +（4.27-2 (9)/(17) ） 45×2.08+1.5×37.6 99999×77778+33333×66666 ； (362+548×361)/(362×548-186) (1)/(1×4) + (1)/(4×7) + (1)/(7×10) +…+ (1)/(97×100) (1)/(2) + (1)/(4) + (1)/(8) + (1)/(16) + (1)/(32) ． 1.7+3.98+ (1)/(50) (47)/(50) ×51 1.7+3.98+ (1)/(50) (1)/(50) (1)/(50) 1 50 1 1 50 50 (47)/(50) ×51 (47)/(50) ×51(47)/(50) 47 50 47 47 50 50 5.73-3 (8)/(17) +（4.27-2 (9)/(17) ） 45×2.08+1.5×37.6 5.73-3 (8)/(17) +（4.27-2 (9)/(17) ） (8)/(17) +（4.27-2 (9)/(17) ）(8)/(17) 8 17 8 8 17 17 (9)/(17) ）(9)/(17) 9 17 9 9 17 17 45×2.08+1.5×37.6 99999×77778+33333×66666 ； (362+548×361)/(362×548-186) 99999×77778+33333×66666 ； (362+548×361)/(362×548-186) (362+548×361)/(362×548-186) (362+548×361)/(362×548-186) 362+548×361 362×548-186 362+548×361 362+548×361 362×548-186 362×548-186 (1)/(1×4) + (1)/(4×7) + (1)/(7×10) +…+ (1)/(97×100) (1)/(2) + (1)/(4) + (1)/(8) + (1)/(16) + (1)/(32) ． (1)/(1×4) + (1)/(4×7) + (1)/(7×10) +…+ (1)/(97×100) (1)/(1×4) + (1)/(4×7) + (1)/(7×10) +…+ (1)/(97×100) (1)/(1×4) 1 1×4 1 1 1×4 1×4 (1)/(4×7) + (1)/(7×10) +…+ (1)/(97×100) (1)/(4×7) 1 4×7 1 1 4×7 4×7 (1)/(7×10) +…+ (1)/(97×100) (1)/(7×10) 1 7×10 1 1 7×10 7×10 (1)/(97×100) (1)/(97×100) 1 97×100 1 1 97×100 97×100 (1)/(2) + (1)/(4) + (1)/(8) + (1)/(16) + (1)/(32) ． (1)/(2) + (1)/(4) + (1)/(8) + (1)/(16) + (1)/(32) ．(1)/(2) 1 2 1 1 2 2 (1)/(4) + (1)/(8) + (1)/(16) + (1)/(32) ．(1)/(4) 1 4 1 1 4 4 (1)/(8) + (1)/(16) + (1)/(32) ．(1)/(8) 1 8 1 1 8 8 (1)/(16) + (1)/(32) ．(1)/(16) 1 16 1 1 16 16 (1)/(32) ．(1)/(32) 1 32 1 1 32 32

Answer 1

1.7+3.98+ 1 50 ，=1.7+（3.98+0.02），=1.7+4，=5.7； 47 50 ×51，= 47 50 × （50+1），= 47 50 ×50+ 47 50 ×1 ，=47 + 47 50 ，=47 47...