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156^7=........6
1061^9=......1
156^7+ 1061^9=........7
156^7. 1061^9=............6
Câu 2:
a: \(=9\cdot8-72:4=72-18=54\)
b: \(=125\cdot26+125\cdot32+125\cdot42\)
\(=125\left(26+32+42\right)=125\cdot100=12500\)
c: \(=5871:\left(928-825\right)+1=5871:103+1=57+1=58\)
d: \(=2012+78-178-2012=-100\)
A = 6427 = (642)13.64 = (\(\overline{...6}\))13.64 = \(\overline{...6}\) .64 = \(\overline{...4}\)
B = 1920 = (192)10 = \(\overline{...1}\)10 = \(\overline{...1}\)
C = 11444 = (1142)22 = \(\overline{...6}\)11 = \(\overline{...6}\)
D = 9999 = ( 992)49.99 = \(\overline{...1}\)49.99 = \(\overline{...9}\)
E = 5345 = ( 534)11.53 = \(\overline{...6}\)11. 53 = \(\overline{...6}\).53 = \(\overline{..8}\)
G = 2345 = (2342)2.234 = \(\overline{..6}\)2 .234 = \(\overline{...6}\). 234 = \(\overline{...4}\)
H = (5796)35 = (5792)105 = \(\overline{...1}\)105 = \(\overline{....1}\)
a: 24/146=12/73
b: 64/92=16/23
c:55/185=11/37
d: 125/1000=1/8
f: 65/91=5/7
a)BCNN(72,540)=1080
b)BCNN(28,49,64)=3136
c)BCNN(43,53)=2279
a) ...7
b) ...3
c) ...5
d) ...6
e) ...8
f) ...0
g) ...3
h) ...5
a) \(\dfrac{22}{55}=\dfrac{2}{5}\)
b) \(\dfrac{-63}{81}=\dfrac{-7}{9}\)
c) \(\dfrac{2.14}{7.8}=\dfrac{2.7.2}{7.2.2.2}=\dfrac{1}{2}\)
d) \(\dfrac{49+7.49}{49}=\dfrac{49.\left(7+1\right)}{49}=\dfrac{49.8}{49}=8\)