a) \(8.64.3+4.75.6-12.39.2\)
\(=24.64+24.75-24.39\)
\(=24\left(64+75-39\right)\)
\(=24.100\)
\(=2400.\)
b) \(1724-3^2\left(7^4.7^{12}:7^{15}+3^2\right)\)
\(=1724-9\left(7^{16}:7^{15}+9\right)\)
\(=1724-9\left(7+9\right)\)
\(=1724-9.16\)
\(=1724-144\)
\(=1580.\)
a) \(8\cdot64\cdot3+4\cdot75\cdot6-12\cdot39\cdot2\)
\(=24\cdot64+24\cdot75-24\cdot39\)
\(=24\cdot\left(64+75-39\right)\)
\(=24\cdot100\)
\(=2400\)
b) \(1724-3^2\cdot\left(7^4\cdot7^{12}:7^{15}+3^2\right)\)
\(=1724-3^2\cdot\left(7^{4+12-15}+3^2\right)\)
\(=1724-3^2\cdot\left(7+9\right)\)
\(=1724-9\cdot16\)
\(=1724-144\)
\(=1580\)
\(a,8.64.3+4.75.6-12.39.2\)
\(=24.64+24.75-24.39\)
\(=24.\left(64+75-39\right)\)
\(=24.100\)
\(=2400\)
\(b,1724-3^2\left(7^4.7^{12}:7^{15}+3^2\right)\)
\(=1724-9\left(7+9\right)\)
\(=1724-9.16\)
\(=1724-144\)
\(=1580\)
Good Luck
