2^3 -5^3 : 5^3 + 12 - 2^2
= 2^3 - 1 + 12 - 2^2
= 8 - 1 + 12 - 4
= 7 + 12 - 4
= 19 - 4
= 15
2^3 -5^3 : 5^3 + 12 - 2^2
= 2^3 - 1 + 12 - 2^2
= 8 - 1 + 12 - 4
= 7 + 12 - 4
= 19 - 4
= 15
56 : 53 + 23 . 22
a) 23 – 53 : 52 + 12.22 | b) 5[(85 – 35 : 7) : 8 + 90] – 50 |
c) 2.[(7 – 33 : 32) : 22 + 99] – 100 | d) 27 : 22 + 54 : 53 . 24 – 3.25 |
e) (35 . 37) : 310 + 5.24 – 73 : 7 | f) 32.[(52 – 3) : 11] – 24 + 2.103 |
g) (72005 + 72004) : 72004 | h) (57 + 75).(68 + 86).(24 – 42) |
i) (75 + 79).(54 + 56).(33.3 – 92) | j) [(52.23) – 72.2) : 2].6 – 7.25 |
1: thực hiện phép tính
a)53-76-[-76-(-53)]
b)-87-12-(-48)+(-512)0
c)2+22+23+.....+2100
2 tìm xϵz,biết
a) (x-1)2=1
b)(x+1)3=-1
c)105-(135-7x):9=97
d)(x+7).(3-x)>0
e)3x-3-32=2.32
g)(2x2+1).(4-2x)=0
giúp nhoa
Tính nhanh
24.(16-5) +16.(24-5)
b) 31.(-18) +31.(-81) - 31
c) 13.(23+22) -3 . (17+ 28)
d) 11/53+(32/47+-10/53)+-64/94+1/-53+1/3
e) (-1+45/115+47/51)+(-9/23+-1/3)
f) -13/15+(-4/5+7/18)+-5/12+1/16
Ai giúp mk vs ạ cảm ơn nhiều ạ ( mk cần nộp gấp ạ)
Bài 2: Tính hợp lí
a.1152-(374+1152)+(-65+374)
b.[53+(-76)]-[-76-(-53)]
c.-48+48.(-78)+21.(-48)
d.(-12).47(-12).52+(-12)
e.(-1)+(-3)+...(-199)+(-201)
f.17+(-20)+23+(-26)+...+53+(-56)
Mấy bạn giúp mình
Tính một cách hợp lí
a) 13.58.4+32.26.2+52.10
b)14.35.5+10.25.7+20.70
C) 15.(27+18+6)+15.(23+12)
d) 53.(51+4)+53.(49+96)+53
e)15.37.4+120.21+21.5.12
bài 1: tính nhanh
14.35.5+10.25.7+20.70
15.(27+18+6) + 15.(23+12)
24.15+49) + 12.(50+42 )
10.(81+19) + 100 + 50 .(91+9)
53.(51 +4) +53 .( 49+96) 53
Tính hợp lí
a, 15.(27+ 18 +6 ) + 15.( 23 +12)
b, 24.(15 + 49 ) + 12. ( 50 + 42 )
c, 53.(51+4)+53.(49+96) +53
d, 42.( 15 +96) +6.(25 +4).7
a)11/53+(32/47+-10/53)+-64/94+1/53+1/3
b) (-1+45/115+47/51)+(-9/23+-1/3)
c) -13/49+12/48+1/12+3/18
d) 13/15+(-4/5+7/18)+-5/12+1/16