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Let us try with five other pairs ...

Let us try with five other pairs of intergers .
`37+16and16+37`

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The correct Answer is:
`=53`
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We know that 3+5=5+3=8 that is the whole numbers can be added in any order . In other words , addition is commutative for whole numbers Can we say the same fot integers also ? We have 5+(-6)=(-6)+5 Are the following equal ? (i) (-8)+(-9)and(-9)+(-8) (ii) (-23)+32and32+(-23) (iii) (-45)+0and0+(-45) Try this with five other pairs of inegers .Do you find any pairs of intergers for which the sums are different when the order is changed ?

When we add zero to any whole number we get the same whole number Zero is called the additive identity for whole numbers .Is it an additive identity again for integers also Observe the following and fill in the blanks (i) (-8)+0=-8 (ii) 0+(-8)=-8 (iii) (-23) +0= (iv) 0+(-37)=-37 (v) 0+(-59)=... (vi) 0+...=-43 (vii) -61 +....=-43 (vii) -61 +...=-61 (viii) ..+0= ..... The above examples shows that zero is an additive identity for integers . you can verify it by a adding zero to any other five integers . In general , for any integer a , a+0=0+a=a

Find the radius of a circle in which a central angle of 60^@ intercepts an arc of 37.4 cm. (Use pi=22/7 )

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NAND LAL PUBLICATION-INTEGERS -QUESTIONS
  1. What happens when we subtract an interger from another integer ...

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  2. We know that 3+5=5+3=8 that is the whole numbers can be add...

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  3. Let us try with five other pairs of integers . 2+(-4)and(-4...

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  4. Let us try with five other pairs of intergers . (-5)+(-1...

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  5. Let us try with five other pairs of intergers . 37+16and16+...

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  6. Let us try with five other pairs of integers . (-12)+18and1...

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  7. Let us try with five other pairs of integers . (-100)+(-200)an...

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  8. If a , b and c are three integers then a+(b+c)=(a+b)+c i....

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  9. Let us take five more such examples to verify Associativity. ...

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  10. Let us take five more such examples to verify Associativity. ...

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  11. Let us take five more such examples to verify Associativity. ...

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  12. Let us take five more such examples to verify Associativity. ...

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  13. Let us take five more such examples to verify Associativity. ...

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  14. When we add zero to any whole number we get the same whole nu...

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  15. Can you find the product (-3)xx(-2) ?

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  16. Can you find the product (-3)xx(-2) ? Observe the following -3xx...

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  17. Now observe these products and fill in the blanks -4xx4 " "...

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  18. What is the product of first five negative negative integers ...

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  19. Observe the following table and complete it . What do ...

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  20. We know that multiplicatio is commutative for whole numbers : C...

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