下面各题怎样简便就怎样算.3.7×99+3.734+16-385.37-1.47-2.53105×(13+15)13+45÷923×58+13×58.
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| 下面各题怎样简便就怎样算. 3.7×99+3.7
5.37-1.47-2.53 105×( 13+45÷9
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(1)3.7×99+3.7,
=3.7×(99+1),
=3.7×100,
=370;(2)34+16-38,
=1824+424-924,
=1324;(3)5.37-1.47-2.53,
=5.37-(1.47+2.53),
=5.37-4,
=1.37;(4)105×(13+15),
=105×13+105×15,
=35+21,
=56;(5)13+45÷9,
=13+5,
=18;(6)23×58+13×58,
=(23+13)×58,
=1×58,
=58.
