Check if replacing subtraction by addition in this way does not change the value of the expression Class 7
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Expert Answer
Check if replacing subtraction by addition in this way does not change the value of the expression Class 7
Question 1.
Check if replacing subtraction by addition in this way does not change the value of the expression, by taking different examples. Class 7
Solution:
Do as directed.
Question 2.
Can you explain why subtracting a number is the same as adding its (additive) inverse, using the Token Model of integers that we saw in the Class 6 textbook of mathematics? Class 7
Solution:
Do as directed.
Question 3.
In the following table, some expressions are given. Complete the table. Class 7
Solution:
| Expression | Expression as the sum of its terms | Terms |
| 13 - 2 + 6 | 13 +(-2) + 6 | 13, -2, 6 |
| 5 + 6 × 3 | 5 + 6 × 3 | 5, 6 × 3 |
| 4 + 15-9 | 4 + 15 +(-9) | 4,15, -9 |
| 23 - 2 × 4 +16 | 23 + (-2 × 4)+ 16 | 23, -2 × 4,16 |
| 28 + 19 - 8 | 28 + 19 +(-8) | 28, 19,-8 |