c) [(-18) + (-7)] -15
d) (-219) - (229) + 12.5
BÀI 1
a, (5 mũ 2 + 1) -9.3 b,80 -(4.5 mũ 2 - 3.2 mũ 3)
c,[(-18) +( -7)] -15 d,(-219)-(-229) + 12.5
a) (52 + 1) - 9.3
= 26 - 9.3
= 16.7
b) 80 - (4.52 - 3.23)
= 80 - (20.25 - 32.768)
= 80 - (-12.518)
= 92.518
c)[(-18) + (-7)] -15
= -25 - 15
= -40
d) (-219) - (-229) + 12.5
= 10 + 12.5
= 22.5
Tick cho mik nhé
a) (52+1)-9.3
b) 80-(4.52-3.23)
c) [(-18)+(-7)]-15
d) (-219)-(-229)+12.5
a,(5^2+12)-9.3
b,80-(4.5^2-3.2^3)
c,[(-18)+(-7)] -15
d,(-219)-(-229)+12.5
ai nhanh minh tick cho
2 tính
a ) (52+1 ) - 9.3
b) 80- ( 4.52 - 3.23)
c) [ ( -18 ) + ( -7 ) ] -15
d) ( -219 ) - ( -229 ) + 12.5
a) (5^2+1)-9.3= 26-27=-1
b) 80 - (4.5^2-3.2^3)=80-(100-24)=4
c) [(-18)+(-7)]-15=-25-15=-40
d) (-219)-(-229)+12.5=10+12.5=22.5
Tính :
(-219) – (-229) + 12.5
(-219) -(-219) + 12. 5
= (-219) + 219 + 12. 5
= 0 + 60
= 60
~ hok tốt ~
Ta Có:
\(\left(-219\right)-\left(-229\right)+12,5\)
\(=-219+229+12,5\)
\(=10+12,5\)
\(=22,5\)
2. Tính:
a) (52 + 1) - 9.3; b) 80 - (4.52 - 3.23);
c) [(-18) + (-7)] - 15; c) (-219) - (-229) + 12.5.
Tính tổng:
A, [(-8)+(-7)]+(-10)
B, -555-(-333)-100-80
C, -(-229)+(219)-401+12
D, 300-(-200)-(-120)+18
a) = (-15)+(-10)
= -25
b) = (-222)-100-80
= (-322)-80
= -402
c) = 229+219-401+12
= 448-401+12
=47+12
= 59
d) = 500-(-120)+18
= 620+18
= 638
tính bằng cách phá ngoặc
[ ( - 8 ) + ( - 7 ) + ( - 10 )
- [ ( - 229 ) + ( - 219 ) ] - 401 + 12
300 - ( - 200 ) - ( - 120 ) + 18
- 326 - ( 115 - 326 )
a, [ (-8) + (-7)] + (-10)
= (-8)+ (-7 ) +(-10)
= (-15)+ (-10)
= -25
b, -[ (-229) + (-219)] - 401 + 12
= (-229) - (219) - 401 + 12
= (-229) + 219 + (-401)+ 12
= (- 10) + (-401)+12
= (- 411)+ 12
= -399
c, 300 - (-200)- (-120) + 18
= 300 + 200 + 120 + 18
= 500 + 120 + 18
= 620 + 18
= 638
d, (-326) - (115 - 326)
= (-326) - 115 + 326
= (-326)+ (-115) +326
= [(-326 + 326] + (- 115)
= 0 + (-115)
= -115
giúp mình zới !!!
a) ( - 5 ^ 2 + 1 ) - 9 . 3
b) 80 - ( 4 . 5 ^ 2 - 3. 2 ^ 3 )
c) [ ( - 18 ) + ( - 7 ) ] - 15
d) ( - 219 ) - ( - 229 ) + 12 . 5
a) (-52+1)-9.3
=26-27
=-1
b)80-(4.52-3.23)
=80-(100-24)
=80-76
=4
c) [(-18)+(-7)]-15
=-25-15
=-40
d) (-219)-(-229)+12.5
=10+60
=70