题目内容
先估算,再计算.
(1)6386+3259+1803
估算:计算:
(2)1508÷29×31
估算:计算:
(1)6386+3259+1803
估算:计算:
(2)1508÷29×31
估算:计算:
(1)估算:6386+3259+1803,
=6000+3000+2000,
=11000;
计算:6386+3259+1803,
=9645+1903,
=11448.
(2)估算:1508÷29×31,
=1500÷30×30,
=1500;
计算:1508÷29×31,
=52×31,
=1612.
=6000+3000+2000,
=11000;
计算:6386+3259+1803,
=9645+1903,
=11448.
(2)估算:1508÷29×31,
=1500÷30×30,
=1500;
计算:1508÷29×31,
=52×31,
=1612.
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