Giải thích các bước giải:
\(\begin{array}{l}
1\backslash 35\left( {18 - 28} \right) = 35.\left( { - 10} \right) = - 350\\
2\backslash 45 - 5.12 - 5.9 = 45 - 60 - 45 = - 60\\
3\backslash 24.16 - 24.5 - 24.16 + 5.16\\
= 5\left( { - 24 + 16} \right) = - 8.5 = - 40\\
4\backslash 29.19 - 29.13 - 29.19 + 19.13\\
= 13.\left( { - 29 + 19} \right) = 13.\left( { - 10} \right) = - 130\\
5\backslash 31.\left( { - 18 - 81 - 1} \right) = 31.\left( { - 100} \right) = - 3100\\
6\backslash - 12.\left( {47 + 52 + 1} \right) = - 12.100 = - 1200\\
7\backslash 13.45 - 3.45 = 45\left( {13 - 3} \right) = 45.10 = 450\\
8\backslash - 48.\left( {1 + 78 + 21} \right) = - 48.100 = - 4800
\end{array}\)
