用简便方法计算下列各题
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(1)(2+4)×15
=2×15+4×15
=30+60
=90
(2)5×(20+6)
=5×20+6×5
=100+30
=130
(3)8×23+8×27
=8×(23+27)
=8×50
=400
(4)9×6+4×9
=9×(6+4)
=9×10
=90
(5)99×14
=(100-1)×14
=100×14-14
=1400-14
=1386
(6)75×99+75
=75×(99+1)
=75×100
=7500
(7)102×36
=(100+2)×36
=100×36+2×36
=3600+72
=3672
(8)49×80+80
=(49+1)×80
=50×80
=4000
(9)430-216-184
=430-(216+184)
=430-400
=30
(10)67×9+33×9
=(67+33)×9
=100×9
=900
(11)(13×8)×125
=13×(8×125)
=13×1000
=13000
(12)20×(17×5)
=(20×5)×17
=100×17
=1700
(13)14×20×5
=14×(20×5)
=14×100
=1400
(14)276×38+276×62
=276×(38+62)
=276×100
=27600
(15)102×26
=(100+2)×26
=100×26+2×26
=2600+52
=2652