(Show scratch work of computation for 213 88 – 125 c). When you wrote the scratch work in part b), did it matter whether you put 88 or 213 on top? Why or why not? Yes, it mattered, because you up scratch work for subtraction with the smaller can’t set number on top. do this: You can’t 88 213 – d). Will the sum be positive or negative? ____Pos_______. e). the sum? __125___. What’s 16). When you have to do scratch-work to subtract two positive numbers, the larger number has to be on top, like this: Question: How do these examples relate to #15? Please answer in a complete sentence. In #15, we had to put the 213 on top, even though it was the second number in the problem (the problem said -88 + 213). 17). Please calculate each answer. SHOW SCRATCH WORK for each question. Please circle your answers, and forget to put a negative sign on them if don’t they’re negative. a). -88 + -213 b). 54 + -400 c). 355 + -198 88 400 355 + 213 54 198 – – 301 346 157 -301 -346 157 18). Try these problems. Addition Do the chips How many chips are left at Is the what’s What’s Problem add up, or the end? left sum? cancel out? Positive or Negative? Show scratch work! -80 + 210 Cancel 130 Pos 130 -42 + -214 Add up 256 Neg -256 -6,532 + 412 Cancel 6120 Neg -6120
(Show scratch work of computation for 213 – 88 125 c). When you wrote the scratch work in part b), did it matter whether you put 88 or 213 on top? Why or why not? Yes, it mattered, because you can’t set up scratch work for subtraction with the smaller number on top. You can’t do this: 88 – 213 d). Will the sum be positive or negative? ____Pos_______. e). What’s the sum? __125___. 16). When you have to do scratch-work to subtract two positive numbers, the larger number has to be on top, like this: Question: How do these examples relate to #15? Please answer in a complete sentence. In #15, we had to put the 213 on top, even though it was the second number in the problem (the problem said -88 + 213). 17). Please calculate each answer. SHOW SCRATCH WORK for each question. Please circle your answers, and don’t forget to put a negative sign on them if they’re negative. a). -88 + -213 b). 54 + -400 c). 355 + -198 88 400 355 + 213 – 54 – 198 301 346 157 -301 -346 157 18). Try these problems. Addition Problem Do the chips add up, or cancel out? How many chips are left at the end? Show scratch work! Is what’s left Positive or Negative? What’s the sum? -80 + 210 Cancel 130 Pos 130 -42 + -214 Add up 256 Neg -256 -6,532 + 412 Cancel 6120 Neg -6120