(1^2+2^2+3^+....+10^2).(65.111-13.15.17)
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Tính giá trị biểu thức
(1+2+...+100)(1^2+2^2+...+10^2)(65.111-13.15.17)
(12+22+....+20162) . (65.111-13.15.17)= ?
(1^2+2^2+...+2016^2).(65.111-13.15.17)
=(1^1+2^2+...+2016^2).0
=0
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tính nhanh
a) (105+155-55):55
b) (1+2+3+....+100) . (12+22+32+...+1002).(65.111-13.15.17)
b)Ghi đầu baì
=(1+2+3+...+100).(12+22+32+....+1002).(65.111-13.555)
=(1+2+3+...+100).(12+22+32+....+1002).(65.111-13.5.111)
=(1+2+3+...+100).(12+22+32+....+1002).(111.(65-65))
=(1+2+3+...+100).(12+22+32+....+1002).111.0
=(1+2+3+...+100).(12+22+32+....+1002).0
=0
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Tính giá trị biểu thức
a.631
b.2716:910
c.(1+2+3+...+100).(12+22+32+...+102).(65.111-13.15.17)
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a,631=631
b, 2716:910=(33)16:(32)10=348:320=328
c,(1+2+3+.....+100).(12+22+32+...+102).(65.111-13.15.17)
=(1+2+3+.....+100).(12+22+32+...+102).(13.15.17-13.15.17)
=(1+2+3+.....+100).(12+22+32+...+102).0
=0
nhớ like
TINH : ( 25.3.4.125.6.8) . ( 2+22+23+24+...+2100).(65.111-13.15.17)
1 tinh nhanh
a)19.(-64)+(-76).34
b)136. (-68) +16.(-272)
c)19991999.1998-19981998.1999
d)(2+6+8+10+...+100).(36.333-108.111)
e)(1^2+2^2+3^2+...+10^2).(1+2+3+...+100).(65.111-13.15.17)
ai lam het dc thi tui bai phuc luon
(25.3.4.125.6.8).(2+22+23+24+...+2100).(65.111-13.15.17)
GIÚP MK DIỄN GIẢI RA NHA ! THANKS NHÌU !
( 1+2+3+.....+100 ) (1^2+2^2+3^2+...+10^2) x ( 65.111 - 13.15.37) = ?
tính ( 1+2+3+...+100).(1^2+2^2+3^2+...+10^2).(65.111+13.15.3)