Now can-t you easily do these-i 4-1ii 6-2iii 12-8iv 2-2v 4-7-2-7

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Standard VII

Mathematics

Addition and Subtraction of Integers

Now can't you...

Question

Now can’t you easily do these?

(i) 4 − (−1)

(ii) 6 − (−2)

(iii) 12 − (−8)

(iv) 2 − (−2)

(v)

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Solution

We know that for any two positive numbers x and y, we have x − (−y) = x + y.

(i) 4 − (−1) = 4 + 1 = 5

(ii) 6 − (−2) = 6 + 2 = 8

(iii) 12 − (−8) = 12 + 8 = 20

(iv) 2 − (−2) = 2 + 2 = 4

(v) = =

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Now can’t you do these?

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Can you now do these?

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Now can’t you compute these?

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Now can’t you easily do these? (i) 4 − (−1) (ii) 6 − (−2) (iii) 12 − (−8) (iv) 2 − (−2) (v)

We know that for any two positive numbers x and y, we have x − (−y) = x + y. (i) 4 − (−1) = 4 + 1 = 5 (ii) 6 − (−2) = 6 + 2 = 8 (iii) 12 − (−8) = 12 + 8 = 20 (iv) 2 − (−2) = 2 + 2 = 4 (v) = =

Now can’t you easily do these?

(i) 4 − (−1)

(ii) 6 − (−2)

(iii) 12 − (−8)

(iv) 2 − (−2)

(v)

We know that for any two positive numbers x and y, we have x − (−y) = x + y.

(i) 4 − (−1) = 4 + 1 = 5

(ii) 6 − (−2) = 6 + 2 = 8

(iii) 12 − (−8) = 12 + 8 = 20

(iv) 2 − (−2) = 2 + 2 = 4

(v) = =