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计算下面各题,怎样简便就怎样算.214×125-206×125478-163-1372000÷25÷4258-102568-(68+178)125×25×322500÷(5×25)169+199281+93+119+20799×3499×99+99102×55382×101-382125×(8×62)469+20356×51+56×48+56.

题目详情
计算下面各题,怎样简便就怎样算.
214×125-206×125478-163-137
2000÷25÷4258-102
568-(68+178)125×25×32
2500÷(5×25)169+199
281+93+119+20799×34
99×99+99102×55
382×101-382125×(8×62)
469+20356×51+56×48+56.
▼优质解答
答案和解析
(1)214×125-206×125
=(214-206)×125
=8×125
=1000

(2)478-163-137
=478-(163+137)
=478-300
=178

(3)2000÷25÷4
=2000÷(25×4)
=2000÷100
=20

(4)258-102
=258-(100+2)
=258-100-2
=158-2
=156

(5)568-(68+178)
=568-68-178
=500-178
=322

(6)125×25×32
=125×25×4×8
=(125×8)×(25×4)
=1000×100
=100000

(7)2500÷(5×25)
=2500÷5÷25
=2500÷25÷5
=100÷5
=20

(8)169+199
=169+(200-1)
=169+200-1
=369-1
=368

(9)281+93+119+207
=(281+119)+(93+207)
=400+300
=700

(10)99×34
=(100-1)×34
=100×34-34
=3400-34
=3366

(11)99×99+99
=(99+1)×99
=100×99
=9900

(12)102×55
=(100+2)×55
=100×55+2×55
=5500+110
=5610

(13)382×101-382
=(101-1)×382
=100×382
=38200

(14)125×(8×62)
=125×8×62
=1000×62
=62000

(15)469+203
=469+(200+3)
=469+200+3
=669+3
=672

(16)56×51+56×48+56
=56×(51+48+1)
=56×100
=5600