Thursday, 4 February 2016

APPROXIMATIONS 1


Estimate the value of 77 x 71.

solution

round off to tens

77 ≈ 80

71 ≈ 70

 = 80 x 70

= 5600

Hence 77 x 71 ≈ 5600

TRY THIS...................


Estimate the value of 81 x 89.

No comments:

Post a Comment