# Estimate each of

(a) Rounding off 87to nearest tens = 90

Rounding of 32 to nearest tens = 30

90 × 30 = 2700

(b) Rounding off 311 to nearest tens = 310

Rounding of 113 to nearest tens = 110

310 × 110 = 34100

(c) Rounding off 3239 to nearest tens = 3240

Rounding of 28 to nearest tens = 30

3240 × 30 = 97200

(d) Rounding off 1385 to nearest tens = 1390

Rounding of 789 to nearest tens = 790

1390 × 790 = 1098100

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