h. A weight gain of 2 kilograms (1) An unexpected birthday gift of R50 3. Using \( +,-, x, \div \), and integers, write a mathematical expression describing each of a. A rugby player gains 40 metres of ground, then loses 25 metres. b. The loss on a business deal has been R3 150 for 12 weeks in a row. c. Eight identical pieces of pizza are shared equally among 4 friends. 4. Find the sum. a. \( 41+53= \) c. \( 43+(-1)= \) e. \( 52+(-28)= \) g. \( (-7)+3+9= \) i. \( 2+6+(-7)+10= \) k. \( 49+(-27)= \) m. \( (-7)+9= \) o. \( (-28)+(-9)= \) 5. Find the difference. a. \( 29-9= \) c. \( 33-(-58)= \) e. \( 40-(-2)= \) g. \( 11-23= \) i. \( (-69)-79= \) 6. Calculate the following. a. \( 36+0= \) c. \( 6+16= \) e. \( 93-92= \) g. \( -256+255= \) i. \( 39-(-8)= \) k. \( -756-47= \) m. \( (-90)+14= \) o. \( (-27)-24= \) q. \( (-16)-(-36)= \) s. \( 16-(-13)-(-5)= \) 7. Find the answers. a. \( 6+(-7)+(-5)-(-2)= \) c. \( 600-398= \) e. \( (-41)+(-40)= \) g. \( (-6)-24= \) i. \( (-7)-(-2)-9= \) k. \( (-3)+5+(-5)+12= \) m. \( 58+(-25)= \) b. \( 49+(-15)= \) d. \( 14+(-94)= \) f. \( (-2)+11+4= \) h. \( 2+10+(-10)+10= \) j. \( 48+(-75)= \) I. \( (-8)+(-5)= \) n. \( 51+(-73)= \) p. \( (-1)+5= \) b. \( 72-40= \) d. \( (-35)-62= \) f. \( 50-76= \) h. \( 22-37= \) (j. \( (-60)-(-58)= \) b. \( \quad 67-0= \) d. \( 23-23= \) f. \( 142-143= \) h. \( (-278)+279= \) j. \( (-81)-(-12)= \) l. \( (-141)+(-7)= \) n. \( 56+(-8)= \) p. \( 38-(-17)= \) r. \( (-16)-6+(-5)= \) (c) \( (-11)-(-14)+7= \) b. \( (-11)-8+1-(-6)= \) d. \( 18-(-37)= \) f. \( (-44)+(-9)= \) h. \( 15-13+2= \) j. \( 7+(-1)+12-7= \) (l.) \( 10-(-10)-7-5= \)
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Did you know that mathematics has a rich history that dates back thousands of years? The ancient Egyptians used a base-10 system not just for trade but also for building structures like the pyramids. They were among the first to use rules for addition and subtraction! Similarly, the Babylonians had a base-60 system, which is why we have 60 seconds in a minute. So every time you crunch numbers, remember: you’re following a tradition that has shaped our world! Math isn't just a subject confined to the classroom; it's all around us in our everyday lives! Ever calculated how much pizza each friend gets? Or how to divide a birthday gift equally? From budgeting your expenses to cooking (like adjusting ingredient amounts), math plays a vital role in daily decision-making. So next time you whip out the calculator, think of all the practical benefits and life's little joys that math brings into focus!
