Question

Answer 1

a: =31/23-7/32-8/23=1-7/32=25/32

b: =2/9+7/9-1/13-25/13-2,5

=1-2-2,5

=-3,5

c: \(=\dfrac{1}{3}+\dfrac{12}{67}+\dfrac{13}{41}-\dfrac{79}{67}+\dfrac{28}{41}=\dfrac{1}{3}\)

d: \(=-30.75+3.1-69.25+6.9=10-100=-90\)

e: \(=\dfrac{-5}{6}\left(\dfrac{13}{11}+\dfrac{9}{11}\right)=\dfrac{-5}{6}\cdot2=-\dfrac{5}{3}\)

g: \(=\dfrac{11}{25}\left(-34.5-65.5\right)=-\dfrac{11}{25}\cdot100=-44\)

Answer 2

Cân nhắc :tui 0 chắc là tui làm đúng đc hết đâu nên có sai sót gì tui xin lỗi nha

a)3/3-1/5+1/3 

=1+(-1/5)+1/3

=15/15+(-3/15)+5/15

=12/15+5/15

=17/15

b)1/6 - 0,4 .5/8+1/2

=1/6 - 2/5.5/8 +1/2 

=1/6 - 1/4 +1/2

=2/12-3/12 +1/2

=(-1/12)+1/2

=(-1/12 )+6/12

=5/12

c)0,3 -8/3 :4/3 .1/5+1

=3/10 -8/3 .3/4.1/5+1

=3/10 - 2 .1/5 + 1

=3/10 - 2/5 +1 

=3/10-4/10 +1

=(-1/10) +1

=(-1/10)+10/10

=9/10

d)(-2/3)² + 1/6 -(-0,5)³

=4/6 + 1/6 - (-1/5)³

=4/6+1/6 +1/125

=(4/6 +1/6) + 1/125

=5/6 +1/125

=625/750 +6/125 

=631/750

e)3/4 :(2/3 -5/9) +9/4 

=3/4 : 2/3 - 5/9 + 9/4 \

=3/4 . 3/2 - 5/9 +9/4 

=9/8 - 5/9+ 9/4 

=36/32 - 40/32 +9/4 

=(-14/32) + 9/4 

=(-7/16)+9/4 

= (-7/16)+ 36/16

=29/16

g) (-1/2)² - 5/8: (0,5)³- 5/3 . (-6)

=1/4 -5/8 : (1/2)³ -5/3 .(-6)\

=1/4 - 5/8 :1/8 -5/3 .(-6)

=1/4 - 5 - 5/3 .(-6)\

=1/4 - 5 . (-10)

=1/4 - 50 

=1/4 - 200/4

=-199/4