-27/5 . -4/15 + -4/15 . ( 2010 - -27/5 )
Tính nhanh
\(\frac{-27}{5}\) x \(\frac{-4}{15}\) + \(\frac{-4}{15}\)x (2010 -\(\frac{-27}{5}\)
=-27/5x -4/15 + -4/15x2010 - -4/15x-27/5 =-4/15x2010 =-52
\(\frac{-27}{5}\)x \(\frac{-4}{15}\)+ \(\frac{-4}{15}\)x \((\)2010 - \(\frac{-27}{5}\)\()\)
1 . Tính
a) -27/5 . -4/15 + -4/15 . ( 2021 - 27/5)
1 . Tính
a) -27/5 . -4/15 + -4/15 . ( 2021 - 27/5)
-27/5 . -4/15 + -4/15 . ( 2021 - 27/5)
=-4/15.[(-27/5)+2021-27/5]
=-4/15.2012,2
= -40244/75
1 . Tính
a) -27/5 . -4/15 + -4/15 . ( 2021 - 27/5)
1 . Tính
a) -27/5 . -4/15 + -4/15 . ( 2021 - 27/5)
-27/5 . -4/15 + -4/15 . ( 2021 - 27/5)
=-4/15.[(-27/5)+2021-27/5]
=-4/15.2012,2
= -40244/75
\(\dfrac{-1}{3}.\dfrac{2}{5}\)
\(\dfrac{-3}{7}.\dfrac{4}{15}\)
\(\dfrac{-9}{3}.\dfrac{15}{27}\)
\(\dfrac{-5}{6}.\)( -12 )
\(\dfrac{-12}{4}.\dfrac{8}{9}\)
\(-3.\dfrac{7}{6}\)
\(\dfrac{-15}{9}.\dfrac{27}{5}\)
\(-9.\dfrac{4}{27}\)
-2/15
-4/35
-5/3
10
-8/3
-7/2
-9
-4/3
Chúc em học giỏi
\(=\dfrac{-2}{15}\\ =\dfrac{-4}{35}\\ =-1\\ =10\\ =\dfrac{-8}{3}\\ =-7\\ =-9\\ =\dfrac{-4}{3}\)
tính nhanh:a) 15/14-(17/13-87+5/4)+(17/23-15/14+1/4) b) 1/25-4/27+(-23/27+-1/25-5/43)+5/43-4/7
tính bằng cách huận tiện nhất A 3 + 4 + 2 + 1 + 2
b/ 8 + 4 + 19 + 11 5 7 5 7 7 27 15 27 15