How can you express 499 to find the product 499X5 using mental math? Explain.

Question

Mathematics

Osborne

12 November, 16:27

How can you express 499 to find the product 499X5 using mental math? Explain.

+5

Answers (1)

Know the Answer?

Talan · Answer 1

2 ways

anything times 5 can be found by halving the number and multiplying by 10

so we get 249.5 times 10 or 2495

or, we can do

499=500-1

so

499 times 5 = (500-1) (5) = 5 (500-1) = 5 (500) + 5 (-1) = 2500-5=2495