Question 18: Quick calculation: 135 + 360 + 65 + 40

30/08/2021 // by admin// Leave a Comment

Question 18: Quick calculation: 135 + 360 + 65 + 40

A. 400

B. 500

C. 600

D. 700

135 + 360 + 65 + 40

= (135 + 65) + (360 + 40)

= 200 + 400 = 600.

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Question 19: Find the natural number (x), knowing: (18 . (x – 16) = 18). »

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