27) \( 1-8 \) \( (-12)-10 \) 28) \( 12-(-5) \) 29) \( (-6)-2 \) 31) \( (-9)-5 \) 32) \( (-4)-(-1) \) 33) \( (-3)-(-2) \) 34) \( 6-12 \) 33) \( (-9)+(-9) \) \( 36)(-9)-1 \) \( 37)(-1)-1 \) 38) \( (-8)+(-4\} \) 39) \( 9-3 \)

Let's solve each of these problems step by step. 27) \( 1 - 8 \) To subtract 8 from 1, you simply subtract the numbers: \( 1 - 8 = -7 \) 28) \( (-12) - 10 \) To subtract 10 from -12, you add the negative numbers: \( -12 - 10 = -22 \) 29) \( (-6) - 2 \) To subtract 2 from -6, you add the negative numbers: \( -6 - 2 = -8 \) 31) \( (-9) - 5 \) To subtract 5 from -9, you add the negative numbers: \( -9 - 5 = -14 \) 32) \( (-4) - (-1) \) To subtract a negative number, you add its positive equivalent: \( -4 - (-1) = -4 + 1 = -3 \) 33) \( (-3) - (-2) \) To subtract a negative number, you add its positive equivalent: \( -3 - (-2) = -3 + 2 = -1 \) 34) \( 6 - 12 \) To subtract 12 from 6, you simply subtract the numbers: \( 6 - 12 = -6 \) 35) \( (-9) + (-9) \) To add two negative numbers, you add their absolute values and keep the negative sign: \( -9 + (-9) = -18 \) 36) \( (-9) - 1 \) To subtract 1 from -9, you add the negative numbers: \( -9 - 1 = -10 \) 37) \( (-1) - 1 \) To subtract 1 from -1, you add the negative numbers: \( -1 - 1 = -2 \) 38) \( (-8) + (-4) \) To add two negative numbers, you add their absolute values and keep the negative sign: \( -8 + (-4) = -12 \) 39) \( 9 - 3 \) To subtract 3 from 9, you simply subtract the numbers: \( 9 - 3 = 6 \) These are the solutions to the given problems.