下面各题,怎样简便就怎样计算.546-127-373 7...
下面各题,怎样简便就怎样计算.546-127-37376+141+59+1242400÷25÷445×9+4530×28-30×13808×125....
下面各题,怎样简便就怎样计算.546-127-373 76+141+59+124 2400÷25÷4 45×9+45 30×28-30×13 808×125.
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(1)546-127-373
=546-(127+373)
=546-500
=46;
(2)76+141+59+124
=76+124+(141+59)
=200+200
=400;
(3)2400÷25÷4
=2400÷(25×4)
=2400÷100
=24;
(4)45×9+45
=45×(9+1)
=45×10
=450;
(5)30×28-30×13
=30×(28-13)
=30×15
=450;
(6)808×125
=(800+8)×125
=8×125+800×125
=1000+100000
=101000.
=546-(127+373)
=546-500
=46;
(2)76+141+59+124
=76+124+(141+59)
=200+200
=400;
(3)2400÷25÷4
=2400÷(25×4)
=2400÷100
=24;
(4)45×9+45
=45×(9+1)
=45×10
=450;
(5)30×28-30×13
=30×(28-13)
=30×15
=450;
(6)808×125
=(800+8)×125
=8×125+800×125
=1000+100000
=101000.
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