能简算的要简算:3-7.14÷3.5×1.056.7×4.2+6.7×4.8+6.737×10176×0.25+0.25×25-0.25258-16.25-3.75.
(1)3-7.14÷3.5×1.05
=3-2.04×1.05
=3-2.142
=0.858;
(2)6.7×4.2+6.7×4.8+6.7
=6.7×(4.2+4.8+1)
=6.7×10
=67;
(3)37×101
=37×(100+1)
=37×100+37×1
=3700+37
=3737;
(4)76×0.25+0.25×25-0.25
=(76+25-1)×0.25
=100×0.25
=25;
(5)258-16.25-3.75
=258-(16.25+3.75)
=258-20
=238.
=3-2.04×1.05
=3-2.142
=0.858;
(2)6.7×4.2+6.7×4.8+6.7
=6.7×(4.2+4.8+1)
=6.7×10
=67;
(3)37×101
=37×(100+1)
=37×100+37×1
=3700+37
=3737;
(4)76×0.25+0.25×25-0.25
=(76+25-1)×0.25
=100×0.25
=25;
(5)258-16.25-3.75
=258-(16.25+3.75)
=258-20
=238.
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