[tex] \tt 1.)\: 2(-5)+(-3)(-7) \\ \tt \: = \: - 10 + 21 \\ \tt \: = \red{ 11} \\ \\ \tt \: 2. (27)÷(-9)-(3)(-2) \\ \tt \: = 27 - 9 + 6 \\ \tt \: = \red{24} \\ \\ \tt \: 3. 16+ (42-2×3)-34 \\ \tt \: = 16 + 36 - 34 \\ \tt \: = \red{18} \\ \\ \tt \: 4. 42 ÷7×[39÷3-8] \\ \tt \: = 6 \times 34 \\ \tt \: = \red{204} \\ \\ \tt \: 5. 32+2[5×(24-6)]-48÷24 \\ \tt \: = 16 \times 5 \times 18 - 2 \\ \tt \: = \red{ 1438} \\ \\ \tt \implies multiply \: and \: divide \: the \: first \\ \tt \: then \: add \: and \: subtract.[/tex]
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