1) A=19952-1994.1996
=19952-(1995-1)(1995+1)
=19952-(19952-1)
=1
2) B=98.28-(184-1)(184+1)
=(9.2)8-[(184)2-1]
= 188-188+1
=1
3) C=1632+74.163+372
=1632+2.37.163+372
=1632+2.163.37+372
=(163+37)2.2
=80000
tính nhanh
a)1272+146.127+732
b)98.28-(184-1)(184+1)
c)1802-2202/1252+150.125+752
Bài 1:
a) 1042 - 16
b) 98.28 - (184 - 1)(184 + 1)
c) 9993 +3.9992 + 3.999 + 1
d) 423 - 6.422 + 12.42 - 8
Bài 2:
a) x(x - 2012) - 2013x +2012.2013 = 0
b) (x - 1)3 + 1 + 3x(x - 4) = 0
c) (x + 4)2 - 16 = 0
Tính nhanh
a) 1272 + 146x127 + 732
b) 98x28 - (184-1)x(184+1)
Tính nhanh :
a) 1272 + 146 . 127 + 732
b) 98 . 28 - (184 - 1)(184+1)
c) 1002 - 992 + 982 - 982 + ... + 22 - 12
d) (202 + 182 + 162 + ... + 42 + 22) - (192 + 172 + ... + 32 + 12)
Tinh nhanh
a)1272+146*127+732
b)98*28-(184-1)(184+1)
c)1002-992+982-972+...+22-12
d)(180^2-220^2)/125^2+150*125+75^2
Tính Nhanh
A= 1995^2 -1994.1996
B= 9^8.2^8-(18^4-1).(18^4+1)
C=163^2+74.163+37^2
D=127^2+146.127+73^2
Tính hợp lí:
a) A= 1995^3+1/1995^2-1994
b) B= 3^8.7^8-(21^4-1).(21^4+1)
c) C= 163^2+74.163+37^2
d) E= 147^2-94.147+47^2
e) F= 3^24-(27^4+1).(9^6-1)
f) D= (2^2+4^2+...+100^2)-(1^2-3^2+...+99^2)
Tính nhanh:
a) 1632+74.163+372
(X+107)/7 +(x+6)/47 +(x+1)/33 +(x+184)/21=0