Question

Câu 1: Tính hợp lý (nếu có thể) 

a, 5¹⁷: 5 ¹⁴ + 12.(-5)                                                                                          b,(2013 - 198 ) - ( 1013 - 1198)  

Answer 1

a, 5¹⁷ : 5¹⁴ + 12 . (-5) = 5³ + -60 = 125 - 60 = 65

b, ( 2013 - 198 ) - ( 1013 - 1198 ) 

= 2013 - 198 - 1013 + 1198

= ( 2013 - 1013 ) + ( -198 + 1198 )

= 1000 + 1000

= 2000

Answer 2

a=65

b=2000

Answer 3

a) \(5^{17}:5^{14}+12.\left(-5\right)\)

\(\text{=}5^{17-14}+\left(-60\right)\)

\(\text{=}5^3-60\)

\(=125-60\text{=}65\)

b)\(\left(2013-198\right)-\left(1013-1198\right)\)

\(=2013-198-1013+1198\)

\(=\left(2013-1013\right)+\left(1198-198\right)\)

\(=1000+1000\)

\(=2000\)