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计算:(能用简便的用简便算)399×99+399283-(125+83)125×25×325+10+15+20+…+90+95+1002006-984-16-996100-98+96-94+92-90+…+8-6+4-299999×26+33333×22125×198÷(18÷8)9999×36+6666

题目详情
计算:(能用简便的用简便算)
399×99+399                283-(125+83)
125×25×325+10+15+20+…+90+95+100         
2006-984-16-996100-98+96-94+92-90+…+8-6+4-2
99999×26+33333×22                      125×198÷(18÷8)
9999×36+6666×3×32     8795-4998+2994-3002-2008.
▼优质解答
答案和解析
(1)399×99+399                
=399×(99+1)
=399×100
=39900

(2)283-(125+83)
=283-83-125
=200-125
=75

(3)125×25×32
=125×25×(8×4)
=(125×8)×(25×4)
=1000×100
=100000

(4)5+10+15+20+…+90+95+100
=(5+100)+(10+95)+…+(50+55)
=105×10
=1050

(5)2006-984-16-996
=(2006-996)-(984+16)
=1010-1000
=10

(6)100-98+96-94+92-90+…+8-6+4-2
=(100-98)+(96-94)+(92-90)+…+(8-6)+(4-2)
=2×25
=50

(7)99999×26+33333×22                      
=(33333×3)×26+33333×22
=33333×(3×26)+33333×22
=33333×78+33333×22
=33333×(78+22)
=33333×100
=3333300

(8)125×198÷(18÷8)
=125×198÷18×8
=(125×8)×(198÷18)
=1000×11
=11000

(9)9999×36+6666×3×32     
=3333×3×36+3333×2×3×32
=3333×(108+192)
=3333×300
=999900

(10)8795-4998+2994-3002-2008
=8795+2994-(4998+3002)-2008
=8795+3000-6-8000-2008
=(8795-8000)+3000-6-2008
=795+3000-6-2008
=1795-6-8
=1781