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CBSE Class 6 Mathematics Question 3 of 41

The Other Side of Zero — Question 3

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

Other such expressions are:
(+3) + (-8) = -5
(+4) + (-9) = -5
(+5) + (-10) = -5
(+6) + (-11) = -5
And there could be infinite such expressions.
10.1 Bela’s Building of Fun Figure it Out (Page No. 246)
Evaluate these expressions by thinking of them as the resulting movement of combining button presses:
(a) (+1) + (+4) = _______________
Solution:
Target floor = (+1) + (+4) = +5
(b) (+4) + (+1) = _______________
Solution:
Target floor = (+4) + (+1) = +5
(c) (+4) + (-3) + (-2) = _______________
Solution:
Target floor = (+4) + (-3) + (-2)
= 4 + (-5)
= -1
(d) (-1) + (+2) + (-3) = _______________
Solution:
Target floor = (-1) + (+2) + (-3)
= (-4) + (2)
= -2
10.1 Bela’s Building of Fun Figure it Out (Page No. 247)
Notice that all negative number floors are below Floor 0. So, all negative numbers are less than 0. All the positive number floors are above Floor 0. So, all positive numbers are greater than 0.