Let us try to find a few more pairs of numbers from their sums and differences: Class 7

Let us try to find a few more pairs of numbers from their sums and differences: Class 7

Question 1.

Let us try to find a few more pairs of numbers from their sums and differences: Class 7

(a) Sum = 27, Difference = 9

(b) Sum = 4, Difference = 12

(c) Sum = 0, Difference = 10

(d) Sum = 0, Difference = - 10

(e) Sum = - 7, Difference = - 1

(f) Sum = - 7, Difference = - 13

Solution:

(a) 18 and 9.

(b) 8 and -4.

(c) 5 and -5.

(d) -5 and 5.

(e) -4 and -3.

(f) -10 and 3.

Based on this new model, answer the following questions :

Question 2.

If the first movement is -4 and the final position is 5, what is the second movement? Class 7

Solution:

+ 9

Question 3.

If there are multiple strikes causing movements in the order 1, - 2, 3, - 4, ..., - 10, what is the final position of the coin? Class 7

Solution:

-5