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4. They often go on a trek.
change into present perfect tense
​

By Isabella

4. They often go on a trek.
change into present perfect tense
​

About the author
Isabella

Q.2 Complete the patterns

A) 1, 3, 7, 13, 21,______ B)29, 22, 16, 11, 7,__________​

Verify the closure property of the addition for the following rational numbers:
(a) −5/9 and 5/9
(b) −19/18 and −11/12

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