脱式计算(用自己喜欢的方法计算).27×101 287-154-46 73×106-73×6 (320+120)÷(20-16) 83
脱式计算(用自己喜欢的方法计算).27×101287-154-4673×106-73×6(320+120)÷(20-16)83+(420÷30+15)25×125×8×4...
脱式计算(用自己喜欢的方法计算).27×101 287-154-46 73×106-73×6 (320+120)÷(20-16) 83+(420÷30+15) 25×125×8×4.
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(1)27×101,
=27×(100+1),
=27×100+27×1,
=2700+27,
=2727;
(2)287-154-46,
=287-(154+46),
=287-200,
=87;
(3)73×106-73×6,
=73×(106-6),
=73×100,
=7300;
(4)(320+120)÷(20-16),
=440÷4,
=110;
(5)83+(420÷30+15),
=83+(14+15),
=83+29,
=112;
(6)25×125×8×4,
=25×4×125×8,
=100×1000,
=100000.
=27×(100+1),
=27×100+27×1,
=2700+27,
=2727;
(2)287-154-46,
=287-(154+46),
=287-200,
=87;
(3)73×106-73×6,
=73×(106-6),
=73×100,
=7300;
(4)(320+120)÷(20-16),
=440÷4,
=110;
(5)83+(420÷30+15),
=83+(14+15),
=83+29,
=112;
(6)25×125×8×4,
=25×4×125×8,
=100×1000,
=100000.
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