Which of the following is not true a) (7 + 8) + 9 = 7 + (8 + 9) - Maths - Whole Numbers

Question

Which of the following is not true?
a) (7 + 8) + 9 = 7 + (8 + 9) b) (7 × 8) × 9 = 7 ×
(8 × 9)
c) 7 + 8 × 9 = (7 + 8) × (7 + 9) d) 7 × (8 + 9) =
(7 × 8) + (7 × 9)

Atul Shaw · Accepted Answer

Dear student,a
 It represents associative property of addition
Thus it is valid b
 It represent associative property of multiplication
 Thus it is valid c
 No such identities is there d
 It represent distibutive property
 Thus it is valid
One can also check by calculating RHS and LHS separately and then compareit
Regards

Which of the following is not true? a) (7 + 8) + 9 = 7 + (8 + 9) b) (7 × 8) × 9 = 7 × (8 × 9) c) 7 + 8 × 9 = (7 + 8) × (7 + 9) d) 7 × (8 + 9) = (7 × 8) + (7 × 9)

Which of the following is not true?
a) (7 + 8) + 9 = 7 + (8 + 9) b) (7 × 8) × 9 = 7 × (8 × 9)
c) 7 + 8 × 9 = (7 + 8) × (7 + 9) d) 7 × (8 + 9) = (7 × 8) + (7 × 9)