1.

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

Answer»

Step-by-step explanation:

(c) is correct

(a) 15+9 = 7+17

24 = 24

(b) 56 ×9 = 7×72

504 = 504

(c) 7 + 72 = 15 × 16

79 ≠ 240

(d) 7 × 17 = 56 + 63

119 = 119

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