Figure it out - Page 265, 266
Last updated at October 10, 2025 by Teachoo
Transcript
Question 7 Here are six integer cards: (+1), (+7), (+18), (–5), (–2), (–9). You can pick any of these and make an expression using addition(s) and subtraction(s). Here is an expression: (+18)+(+1)–(+7) – (–2) which gives a value (+14). Now, pick cards and make an expression such that its value is closer to (– 30).To get a large negative value, we should subtract the large positive numbers from a negative number. Now, to make 30 from these numbers, we can do 18 + 9 + 2 + 1 = 30, now we just make all numbers negative Or 18 + 7 + 5 = 30, and we can make the numbers negative So, our expression could be (–9) – (18) + (–2) – (1) And, (–5) – (7) – (18)