Problem
18. \( 10 \cdot|-\sqrt{9}|+(3 \cdot 4)^{2}+7^{2}-9 \cdot 2 \)
Solution
Step 1 ：\( 10 \cdot|-\sqrt{9}|+(3 \cdot 4)^{2}+7^{2}-9 \cdot 2 \)
Step 2 ：\( 10 \cdot|-3|+(3 \cdot 4)^{2}+7^{2}-9 \cdot 2 \)
Step 3 ：\( 10 \cdot 3+(12)^{2}+7^{2}-9 \cdot 2 \)
Step 4 ：\( 30+144+49-18 \)
Step 5 ：\( 205 \)
