54+66=?
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9 x 9 - 66 = 15
54 : 9 + 2 = 8
66 - 11 + 56 = 111
100 - 99 + 21 = 22
~~~~~~hk tốt nha ~~~~~~!!!!!!>>>>>######3333
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54. A
55. C
56. C
57. A
58. B
59. B
60. D
61. A
62. C
63. B
64. A
65. A
66. D
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63.66+63.54+120.37=63.(66+54)+120.37=63.120+120.37=120.(63.37)=120.100=12000
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100 + 54 + 65 + 66 + 55 + 10 + 6=356
k cho mk nha
mk nhanh nhất
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ta có: 2005 + 53-54-55+56-57-58-59+60+61-62-63+64+65-66-67+68+69
= 2005+(53-54-55+56)+(57-58-59+60)+(61-62-63+64)+(65-66-67+68)+69
= 2005+0+0+0+0+69
= 2005+69
= 2074
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a) Ta có: \(4567+1234-4567-\left(-66\right)\)
\(=4567-4567+1234+66\)
\(=1234+66=1300\)
b) Ta có: \(2004-15+54-2004-54\)
\(=\left(2004-2004\right)+\left(54-54\right)-15\)
\(=0+0-15\)
\(=-15\)
c) Ta có: \(-45789-357-45789+57\)
\(=-91578-300=-91878\)
54+66=120 nha bạn ơi
54+66=120