Does adding the terms of an expression in any order give the same value? Class 7

Does adding the terms of an expression in any order give the same value? Class 7

Question 1.

Does adding the terms of an expression in any order give the same value? Take some more expressions and check. Consider expressions with more than 3 terms also. Does adding the terms of an expression in any order give the same value? Class 7

Solution:

Yes. Do as directed.

For example,

(-5 + 3) + (6 + 2) = (-5 + 6) + (3 + 2) = 6.

Question 2.

Can you explain why this is happening using the Token Model of integers that we saw in the Class 6 textbook of mathematics? Class 7

Solution:

Do as directed.

Question 3.

Manasa is adding a long list of numbers. It took her five minutes to add them all and she got the answer 11749. Then she realised that she had forgotten to include the fourth number 9055. Does she have to start all over again? Class 7

Solution:

No. She may add the fourth number 9055 to 11749 and obtain the answer.