Evaluate these expressions (you may think of them as Starting Floor + Movement by referring Class 6

Evaluate these expressions (you may think of them as Starting Floor + Movement by referring Class 6

Question 1.

Evaluate these expressions (you may think of them as Starting Floor + Movement by referring to the Building of Fun). Class 6

Solution:

(a) (+ 1) + (+ 4) = +5

(b) (+ 4) + (+ 1) = +5

(c) (+ 4) + (- 3) = +1

(d) (- 1) + (+ 2) = +1

(e) (- 1) + (+ 1) = 0

(f) 0 + (+ 2) = +2

(g) 0 + (- 2) = -2

Question 2.

Starting from different floors, find the movements required to reach Floor -5. For example, if I start at Floor + 2, I must press - 7 to reach Floor - 5. The expression is (+2) + (-7) = -5. Class 6

Find more such starting positions and the movements needed to reach Floor -5 and write the expressions.

Solution:

If I start at floor +3,1 must press -4 to reach floor -1; if I start at floor +1; I must press +3 to reach floor +4; if I start at floor -2,1 must press +5 to reach floor +3, and so on.

The corresponding expression for these movements are (+3) + (-4) = -1; (+1) + (+3) = +4; (-2) + (+5) = (+3) and so on.

Question 3.

Evaluate these expressions by thinking of them as the resulting movement of combining button presses: Class 6

(a) (+ 1) + (+ 4) = __________

(b) (+ 4) + (+ 1) = ________

(c) (+ 4) + (- 3) + (- 2) = ___________

(d) (- 1) + (+ 2) + (- 3) = ___________

Solution:

(a) (+ 1) + (+ 4) = +5

(b) (+ 4) + (+ 1) = +5

(c) (+ 4) + (- 3) + (- 2) = -1

(d) (- 1) + (+ 2) + (- 3) = -2