1997×0.71+11× 7 1 4 +2222×0.29=______.
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1997×0.71+11× 7 1 4 +2222×0.29
=1997×0.71+11×7.25+2222×0.29
=1997×0.71+11×7.25+1997×0.29+225×0.29
=1997×(0.71+0.29)+225×0.29+10×7.25+7.25
=1997×(0.71+0.29)+225×0.29+72.5+0.29×25
=1997+72.5+0.29×(225+25)
=1997+72.5+72.5
=2142
故填:2142.
=1997×0.71+11×7.25+2222×0.29
=1997×0.71+11×7.25+1997×0.29+225×0.29
=1997×(0.71+0.29)+225×0.29+10×7.25+7.25
=1997×(0.71+0.29)+225×0.29+72.5+0.29×25
=1997+72.5+0.29×(225+25)
=1997+72.5+72.5
=2142
故填:2142.
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