a) 73 + 362 + 163 + 138 + 27 + 237
= (73 + 27) + (362 + 138) + (163 + 237)
= 100 + 500 + 400
= 1000
b) \(5^4\cdot5^6+3\cdot2^2-10^0\)
\(=5^{10}+3\cdot4-1\)
\(=9765625+12-1\)
\(=9765636\)
c) \(A=12:\left\{390:\left[500-\left(125+35\cdot7\right)\right]\right\}\)
\(=12:\left\{390:\left[500-\left(125+245\right)\right]\right\}\)
\(=12:\left\{390:\left[500-370\right]\right\}\)
\(=12:\left\{390:130\right\}\)
\(=12:3=4\)
Câu b sai đề kìa bạn
uk ha, dạo này sai miết :v
b) 54 . 56 . 58 + 3 . 22 - 100
= 518 + 3 . 4 - 1
= 518 + 12 - 1
= 518 + 11
