问题
解答题
估算.
|
答案
(1)67245+72458,
≈67000+72000,
=139000;
(2)98210+33871,
≈98000+34000,
=132000;
(3)87654-12345,
≈88000-12000,
=76000;
估算.
|
(1)67245+72458,
≈67000+72000,
=139000;
(2)98210+33871,
≈98000+34000,
=132000;
(3)87654-12345,
≈88000-12000,
=76000;