APPROXIMATIONS-1

Estimate the value of 27 x 71.

solution

round off to tens

27 ≈ 30  [approximating to 30]

71 ≈ 70  [approximating to 70]

  = 30 x 70

  = 2100

Hence 27 x 71 ≈ 2100

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

Estimate the value of 62 x 66. {ans. 4200}