Exercise No. 2E

NOTE: Answers to all questions are given at the end of this exercise. Question No. 1: Copy and complete the following by filling in an appropriate operation symbol in each box: (a) (-5)□3=3□(-5)=-15 (b) 23□(-11)=-11□23=12 (c) -64□(-36)=-36□(-64)=100 (d) -6□(-15)=-15□(-6)=90   Question No. 2: Replace each □ with an integer. (a) (-3)×(□+8)=(-3)×(-28)+(-3)×8=□ (b) (-16)×(12+6×12)=(16×16)×□=□ (c) (-5)×(4-□)=-=□ (d) (-11)×(8-9)=-=□ (e) (-11×10)-(9×1)=×□=□ (f) ×(-9)=-=□   Question No. 3: Evaluate the following: (a) 5×2-(-3) (b) 5×2 (c) √10-3×(-2) (d) ³ (e) 24×(-2)×5÷(-6) (f) (16-24)-(57-77)÷(-2) (g) ×(-4) (h) 160÷(-40)-20÷(-5) (i) 2×(-2)+(-2)×(-3)+2×(-3) (j) {-32÷8}-(-7) (k) +   Answers (from left to right)

Exercise No. 2C

NOTE: Answers to all questions are given at the end of this exercise. Question No. 1: Evaluate the following: (a) -3-(6-9) (b) -4-(2-5) (c) -6-(-3)-1 (d) 4-(-9)-5 (e) -2-(-6)-3 (f) 5-7-(-10) (g) 4-(-8)-6-(-11) (h) -12-7(-9)-3 (i) 15-20-13-32   Question No. 2: Find the values of the following expressions. (a) -12-(-24)+(-36) (b) -40+15-27+11 (c) (-5-6)-(15-5) (d) -324+12-56 (e) - (f) 146-(-200)+(-100)-150 (g) -176+(-123)-(-167)+103 (h) -14+26-37-45+65-67-71 (i) 19-27+34+43-58-66-76+81 Answers (from left to right)

Exercise No. 2B

NOTE: Answers to all questions are given at the end of this exercise. Question No. 1: Calculate the following: (a) -5+13 (b) -11+19 (c) 14+(-7) (d) 23+(-12) (e) -37+22 (f) -45+19 (g) 25+(-66) (h) 74+(-89) (i) 101+(-200)   Question No. 2: Evaluate the following: (a) -7+(-11)+9 (b) -10+17+(-21) (c) 34+(-18)+9 (d) 81+(-6)+(-62) (e) 51+14+(-100) (f) -27+71+12 (g) + (h) +   Question No. 3: The temperature of a piece of meat was -8°C when it was taken out of a freezer. After several minutes of warming, its temperature rose by 17°C. what is the new ...