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\(10-\left[\left(8^2-48\right)\cdot5+\left(23\cdot10+8\right):28\right]\)
\(=10-\left[\left(64-48\right)\cdot5+\left(230+8\right):28\right]\)
\(=10-\left(16\cdot5+238:28\right)\)
\(=10-\left(80+\dfrac{17}{2}\right)\)
\(=10-80-\dfrac{17}{2}\)
\(=-17-\dfrac{17}{2}\)
\(=-17-8,5\)
\(=-25,5\)
\(107-\left\{38+\left[7.3^2-24:6+\left(9-7\right)^3\right]\right\}:15\)
\(=107-\left\{38+\left[7.3^2-24:6+2^3\right]\right\}:15\)
\(=107-\left\{38+\left[7.3^2-4+2^3\right]\right\}:15\)
\(=107-\left\{38+\left[63-4+2^3\right]\right\}:15\)
\(=107-\left\{38+\left[59+2^3\right]\right\}:15\)
\(=107-\left\{38+67\right\}:15\)
\(=107-105:15\)
\(=107-7\)
\(=100\)
107 – {38 + [7.32 – 24 : 6+(9 – 7)3]}:15
= 107 - {38+ [7.32 - 24 : 6 + 23 ]} : 15
= 107 - {38 + [ 7.9 - 24 : 6 + 8]} :15
= 107 - {38+[ 63 - 4 + 8]} : 15
= 107 - {38 + 67} : 15
= 107 - 105 : 15
= 107 - 7
= 100
17) 10 – [(82 – 48).5 + (23.10 + 8)] : 28 - 70
= 10 - [(64 - 48).5 + (8.10 +8)] : 28 - 70
= 10 - [16.5 + 88] : 28 - 70
= 10 - [80 + 88] : 28 - 70
= 10 - 168 : 28 - 70
= 10 - 6 - 1
= 3
nếu sai câu nào mong bạn thông cảm ^^
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a) 3.52 + 15.22 - 26 : 2
= 3.25 + 15.4 - 13
= 75 + 60 - 13
= 135 - 13
= 122
b) 2021 + 5.[300 - (17 - 7)2]
= 2021 + 5.[300 - 102]
= 2021 + 5.[300 - 100]
= 2021 + 5.200
= 2021 + 1000
= 3021
c) 32.5 + 23.10 - 81
= 9.5 + 8.10 - 81
= 45 + 80 - 81
= 125 - 81
= 44
a) 3.52 + 15.22 - 26 : 2
= 3. 25 + 15 . 4 - 26 : 2
= 75 + 60 - 13
= 135 - 13
= 122
b) 2021 + 5[300 - (17 - 7)2 ]
= 2021 + 5[300 - 102 ]
=2021 + 5[300 - 100]
=2021 + 5.200
=2021 + 1000
= 3021
c) 32 . 5 + 23 . 10 - 81
= 9 . 5 + 8 . 10 - 81
= 45 + 80 - 81
= 125 - 81
= 44