直接写出得数:(1)9+99+999+×3=______(2)5-=______(3)777×9+111×37-______.

发布时间:2020-08-10 20:49:41

直接写出得数:
(1)9+99+999+×3=______
(2)5-=______
(3)777×9+111×37-______.

网友回答

解:
(1)9+99+999+×3,
=(9+)+(99+)+(999+)+1,
=(9+99+999+1)+(++),
=1108+1,
=1109;

(2)5-,
=5+-,
=5-+,
=4+,
=4;

(3)777×9+111×37,
=(111×7)×9+111×37,
=111×63+111×37,
=111×(63+37),
=111×100,
=11100.
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