-654+(327+300+27)+(-54)-(23)=
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a) 45 - X=24
=>x=45-27=18
b) 54+x=1000
=>x=1000-54=946
c) 654+x=2000
=>x=2000-654=1346
đúng ko.k nha
45 - x = 27
x = 45 - 27
x = 18
54 + x = 1000
x = 1000 - 54
x = 946
654 + x = 2000
x = 2000 - 654
x = 1346
A = \(\dfrac{27}{512}\) \(\times\) \(\dfrac{327}{213}\) \(\times\) \(\dfrac{512}{57}\) \(\times\) \(\dfrac{213}{54}\) \(\times\) \(\dfrac{57}{327}\)
A = \(\dfrac{27\times327\times512\times213\times57}{54\times327\times512\times213\times57}\)
A = \(\dfrac{27}{54}\)
A = \(\dfrac{1}{2}\)
\(a.17+26:2\\ =17+13\\ =30\\ b.300:\left[130-6\left(45-40\right)\right]\\ =300:\left[130-6.5\right]\\ =300:\left[130-30\right]\\ =300:100\\ =3\\ c.\left(-15\right).\left(-2\right)\\ =15.2\\ =30\\ d.\left(-27\right).36+54.\left(-27\right)\\ =\left(-27\right)\left(36+54\right)\\ =\left(-27\right).90\\ =-2430\)
a) 17+14=31
b) 300:[130-6.5)
300:[130-30]
300:100
3
c)30
d)(36+54).(-27)
=90.(-27)
=-2430
\(92-54=38\)
\(52+23=75\)
\(79-52=27\)
\(27+47=74\)
\(38-23=15\)
hk tốt~
a) (65+27-49) - ( 45+37-19)
= 65+27-49 - 45 -37+19
= (65-45)+ ( 27-37) + (-49+19)
= 20 + (-10) + (-30)
= -20
Bài 1:
18/27=2/3
35/25=7/5
54/72=3/4
78/66=13/11
92/100=23/25
75/125=3/5
126/165=42/55
150/300=1/2
1717/1515=17/15