1. Problem: Calculate each sum, difference, product, or quotient of integers. 2. Important rules: - Adding a negative number is like subtracting. - Subtracting a negative number is like adding. - Multiplying or dividing two numbers with the same sign gives a positive result. - Multiplying or dividing two numbers with different signs gives a negative result. 3. Calculations: - $-9 \div 1 = -9$ - $1 \times (-7) = -7$ - $-8 - (-6) = -8 + 6 = -2$ - $-72 \div (-9) = 8$ - $-5 - 8 = -13$ - $-4 + 7 = 3$ - $-6 + (-4) = -10$ - $2 + (-1) = 1$ - $-7 - (-4) = -7 + 4 = -3$ - $-48 \div (-8) = 6$ - $14 \div (-2) = -7$ - $1 - 1 = 0$ - $7 + (-3) = 4$ - $6 + (-2) = 4$ - $1 \times 6 = 6$ - $1 \times (-4) = -4$ - $9 - 9 = 0$ - $7 - 8 = -1$ - $8 - (-7) = 8 + 7 = 15$ - $-5 + 9 = 4$ - $4 \times (-9) = -36$ - $5 + 7 = 12$ - $1 \times (-9) = -9$ - $-42 \div (-6) = 7$ - $-4 \times 2 = -8$ - $9 \times (-4) = -36$ - $-7 - (-1) = -7 + 1 = -6$ - $4 \times (-3) = -12$ - $9 + 3 = 12$ - $-4 + (-8) = -12$ - $1 - 3 = -2$ - $-3 - (-2) = -3 + 2 = -1$ - $54 \div (-9) = -6$ - $-9 + 8 = -1$ - $-1 + 8 = 7$ - $-6 - 7 = -13$ - $4 + (-6) = -2$ - $5 \times (-3) = -15$ - $-20 \div (-5) = 4$ - $6 - 6 = 0$ - $49 \div (-7) = -7$ - $2 \div 2 = 1$ - $2 + 8 = 10$ - $-3 + (-3) = -6$ - $-8 + (-2) = -10$ - $-2 \times 2 = -4$ - $-2 \times 7 = -14$ - $-3 - 1 = -4$ - $-8 \times 1 = -8$ - $8 \times (-8) = -64$ Final answers are as above for each expression.