SAY TRUE OR FALSE
16. X+(-X) = 0.
17. The co-efficient of xy in the term 4xyz is 4.
18. 4mn and -5mn are like terms.
19. When x= -3, the value of the expression 2x -5 is 4.
20. The expression 2m+5n and 7m+3n can not be added.
21. If x is a natural number , then x+1 is its predecessor.
22. Sum of a-b+c and –a+b-c is zero.
23 Every algebraic expression is an equation.
24. The expression 5m+7 can not be reduced without knowing the value
of m.
25. To add two like terms, its co-efficient can be added.
26. 5 – ( -8 ) is same as 5 – 8.
27. 4 × ( - 5 ) = ( -10 ) × ( - 2 ).
28. ( - 9 ) + ( - 11 ) is greater than ( -9 ) – ( -11 ).
29. Integers are closed under addition.
30. a ÷ b = b ÷ a.
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