a)-35.12-8-35=-35(12+8)=-35.20=-700

b)23.(-7)-7.5+(-18).7=-7(23+59+18)=-7.100=-700

c)115-(-12+29)=115+12-29=98

d)\(3\left(-7\right)^2+5\left(-4\right)^3=3.7^2-5.4^3=3.49-5.64=147-320-173\)

\(a,-35.12-8.35\)

\(=\left(-35\right)\left(12+8\right)\)

\(=-700\)

\(b,-23.7-7.59-18.7\)

\(=7\left(-23-59-18\right)\)

\(7.\left(-100\right)=-700\)

\(b,115-\left(-12+29\right)\)

\(=115+12-29\)

\(=98\)

\(c,3.\left(-7\right)^2+5.\left(-4\right)^3\)

\(=3.49-5.64\)

\(=147-320\)

\(=-173\)

a: \(=625-44\cdot12+\dfrac{41}{17}=97+\dfrac{41}{17}=\dfrac{1690}{17}\)

b: \(=-126-11^2+30=-126-121+30=-217\)

\(A=625-\left(61-17\right)\cdot12+\left(27+24\right)\div17\)

\(A=625-44\cdot12+51\div17\)

\(A=625-528+3\)

\(A=100\)

\(B=-126-\left(4^2-5^2\right)+870-29\)

\(B=-126-\left(16-25\right)+870-29\)

\(B=-126-\left(-9\right)+870-29\)

\(B=-117+870-29\)

\(B=753-29\)

\(B=724\)

           Chúc bn hok tốt

1) A \(=625-\left(61-17\right).12+\left(27+24\right):17\)

\(\Leftrightarrow A=625-44.12+51:17\)

\(\Leftrightarrow A=625-528+3\)

\(\Leftrightarrow A=100\)

Vậy A = 100

2) B \(=-126-\left(4^2-5^2\right)+870-29\)

\(\Leftrightarrow B=-126-\left(16-25\right)+870-29\)

\(\Leftrightarrow B=-126-16+25+870-29\)

\(\Leftrightarrow B=724\)

Vậy B = 724

a) \(A=625-\left(61-17\right).12+\left(27+24\right):17\)

\(=625-44.12+51:17\)

\(=625-528+3=100\)

b) \(B=-126-\left(4^2-5^2\right)+870-29\)

\(=-126-16+25+870-29\)

\(=724\)

29+29+......+29+83+...+83

=29.17+83.29

=29(17+83)

=29.100

=2900

tick bạn

19/57 . 2 4/7 - 19/57 . 1 5/7 - 19/57

= 19/57 x  ( 2 4/7 - 1 5/7 )

= 19/57 x 6/7

= 2/7

\(\dfrac{19}{57}.2\dfrac{4}{7}-\dfrac{19}{57}.1\dfrac{5}{7}-\dfrac{19}{57}\)

\(\text{=}\dfrac{19}{57}.\left(2\dfrac{4}{7}-1\dfrac{5}{7}-1\right)\)

\(\text{=}\dfrac{19}{57}.\left(\dfrac{-1}{7}\right)\)

\(\text{=}\dfrac{-1}{21}\)

a) (-21) + |-50| + (-29) – |-2016|

= (-21) + 50 + (-29) – 2016

= [(-21) + (-29) + 50] – 2016 = ( -50 +50 ) – 2016

= 0 – 2016 = - 2016 .