bỏ ngoặc rồi tính -(55-80+91)-(2012+80-91)
Bỏ dấu ngoặc rồi tính:
a) (123 - 27)+ (27+ 13-123); b) (175 + 25 + 13)-(-15 + 175 + 25);
c) (2012 - 119 + 29) - (-119 + 29); d) -(55 - 80 + 91) - (2012 + 80 - 91).
e) 123 + [54 + (-123) + 46]; f) - 64 + [(-110 + 64 + 71].
Bỏ dấu ngoặc rồi tính:
a) (123 - 27)+ (27+ 13-123) -= 123 - 27 + 27 + 13 - 123 = 13
b) (175 + 25 + 13)-(-15 + 175 + 25) = 175 + 25 + 13 + 15 - 175 - 25 = 28
c) (2012 - 119 + 29) - (-119 + 29) = 2012 - 119 + 29 + 119 - 29 = 20122
d) -(55 - 80 + 91) - (2012 + 80 - 91) = - 55 + 80 - 91 - 2012 - 80 + 91 = - 2067
e) 123 + [54 + (-123) + 46] = 123 + 54 - 123 + 46 = 100
f) - 64 + [(-110 + 64 + 71] = -64 -110 +64 + 71 = -39
bỏ ngoặc rồi tính
a, (55 - 27 ) +(27+30 -55)
b, (75+35+15)-(15-75+35)
c, (2015 - 79+19) - (2020+80-91)
a) \(\left(55-27\right)+\left(27+30-55\right)\)
\(=55-27+27+30-55\)
\(=\left(55-55\right)+\left(-27+27\right)+30\)
\(=30\)
b) \(\left(75+35+15\right)-\left(15-75+35\right)\)
\(=75+35+15-15+75-35\)
\(=\left(75+75\right)+\left(35-35\right)+\left(15-15\right)\)
\(=75+75\)
\(=150\)
c) \(\left(2015-79+19\right)-\left(2020+80-91\right)\)
\(=2015-79+19-2020-80+91\)
\(=\left(2015-79\right)+\left(19+91\right)-\left(2020+80\right)\)
\(=1936+110-2100\)
\(=-54\)
bỏ ngoặc rồi tính
a) (2002 - 79+15) -(-79+15)
b) -(515-80+91)-(2003+80-91)
giúp mk
a, ( 2002 - 79 + 15 ) - ( -79 + 15 )
= 2002 -79 +15 +79 -15
= 2002
b, - ( 515 - 80 +91 ) - ( 2003 + 80 - 91 )
= -515 + 80 -91 -2003 - 80 +91
= -2518
a) \(\left(2002-79+15\right)-\left(-79+15\right)=2002-79+15+79-15=2002\)
b) \(-\left(515-80+91\right)-\left(2003+80-91\right)=-515+80-91-2003-80+91=-2518\)
p/s: chúc bạn học tốt
Bỏ dấu ngoặc rồi tính:
a)(2015-79+19)-(-79+19)
b)-(515-80+91)-(2020+80-91)
Bỏ dấu ngoặc rồi tính:
a)(2015-79+19)-(-79+19)
b)-(515-80+91)-(2020+80-91)
Giải:
a,Ta có:(2015-79+19)-(-79+19)=2015-79+19+79-19
=2015-79+79+19-19
=2015+0+0=2015
b,-(515-80+91)-(2020+80-91)=-515+80-91-2020-80+91
=-515-2020+80-80-91+91
=-2535+0+0=-2535
a) (2015-79+19)-(-79+19)
= 2015 - 79 +19 + 79 -19
= 2015 + (79- 79) + (19 -19)
= 2015
b) - (515 - 80 +91) -(2020 +80-91)
= -515 + 80 - 91 - 2020 -80 +91
= -515 -2020 +( 80 -80) + (91 -91)
= -2535
bỏ dấu ngoặc rồi tính
(35+75)+(345-35-75)
(2002-79+15)-(-79+15)
-(515-80+91)-(2003+80-91)
các bn lm giúp mik nhé
(35+75)+(345-35-75)
=35+75-345-35-75
=(35-35)+345+975-75)
(2002-79+15)-(-79+15)
=2002-79+15+79-15
=2002+(79-79)+915-15)
=2002.
-(515-80+91)-(2003+80-91)
=-515+80-91-2003-80+91
(-515)-2003+(80-80)+(91-91)
=2518.
Bỏ ngoặc rồi tính:
(35+75)+(345-35-75)
(2002-79+15)-(-79+15)
-(515-80+91)-(2003+80-91)
( 35 + 75 ) + ( 345 - 35 - 75 )
= 35 + 75 + 345 - 35 - 75
= ( 35 - 35 ) + ( 75 - 75 ) + 345
= 0 + 0 + 345
= 345
( 2002 - 79 + 15 ) - ( -79 + 15 )
= 2002 - 79 + 15 + 79 - 15
= 2002 + ( -79 + 79 ) + ( 15 - 15 )
= 2002 + 0 + 0
= 2002
- ( 515 - 80 + 91 ) - ( 2003 + 80 - 91 )
= -515 + 80 - 91 - 2003 - 80 + 91
= -515 + ( 80 -80 ) + ( -91 + 91 ) - 2003
= -515 + 0 + 0 - 2003
= - 2518
( 35 + 75 ) + ( 345 - 75 - 35 )
= 35 + 75 + 345 - 75 - 35
= ( 35 + 75 ) - ( 75 + 35 ) + 345
= 110 - 110 + 345
= 0 + 345
= 345
a) (35 + 75) + (345 - 35 - 75)
= 35 + 75 + 345 - 35 - 75
= (35 - 35) + (75 - 75) + 345
= 0 + 0 + 345
= 345
b) (2002 - 79 + 15) - [ (-79) +15]
= 2002 - 79 + 15 - 79 - 15
= 2002 - (79 - 79) + (15 - 15)
= 2002 - 0 + 0
= 2002
c) -(515 - 80 + 91) - (2003 + 80 - 91)
= -515 + 80 - 91 - 2003 - 80 + 91
= -515 + (80 - 80) + (91 - 91) - 2003
= -515 + 0 + 0 - 2003
= -515 - 2003
= -2518
Bỏ dấu ngoặc rồi tính : -(515-80+91)-(2003+80-91)
Tính nhanh:(1267-196)-(267+304)
Giúp mình với nke . Giải hản ra đừng viết mỗi đáp án^^
1) -(515 - 80 + 91) - (2003 + 80 - 91)
= -515+80 -91 -2003 - 80 + 91
= -515 + (80 - 80) + (-91 + 91)
= -515 + 0 + 0
= -515
2) (1267 - 196) - (267 +304)
= 1267 -196 -267 -304
= (1267 - 267) + (-196 - 304)
= 1000 + (-500)
= 500
VẬY NHA, CHÚC BẠN HỌC GIỎI! ^^
GIẢI HẲN RA ĐỂ MÀY CHÉP NGUYÊN XI CHỨ GÌ
ĐỒ CON NGU
) (123 – 27) + (27 + 13 – 123)
b) (175 + 25 + 13) – [(-15) + 175 + 25]
c) (2012 – 119 + 29) – [(-119) + 29]
d) – (55 – 80 + 91) – (2012 + 80 – 91)
mn giúp mình với mình đang gấp
c: =2012-119+29+119-29
=2012
Bài 1: Bỏ dấu ngoặc rồi tính:
1) 40 + 15 + (-10) + (-15)
2) -13 + (-750) + (-17) + 750
3) (35 – 17) + (17 + 120 – 35)
4) (55 + 45 + 15) – (15 – 55 + 45)
5) – (12 + 21 – 23) – (23 – 21 + 10)
6) (2020 – 79 + 15) – (- 79 + 15)
7) – (515 – 80 + 91) – (2010 + 80 – 91)
8) 25 – (–17) + 24 – 12
9) 235 – (34 + 135) – 100
10) (13 + 49) – (13 – 135 + 49)
Tớ đang cần gấp. Các bạn giúp tớ nhé. Tớ cảm ơn
1) 40 + 15 + (-10) + (-15) 2) -13 + (-750) + (-17) + 750 3) (35 - 17) + (17 + 120 - 35)
= 40 + 15 - 10 - 15 = -13 - 750 - 17 + 750 = 35 - 17 + 17 + 120 - 35
= (40 - 10) + (15 - 15) = (-13 - 17) + (-750 + 750) = (35 - 35) + (-17 + 17) + 120
= 30 = -30 = 120
4) (55 + 45 + 15) - (15 - 55 + 45) 5) -(12 + 21 - 23) - (23 - 21 + 10) 6) (2020 - 79 + 15) - (-79 + 15)
= 55 + 45 + 15 - 15 + 55 - 45 = -12 -21 + 23 - 23 + 21 - 10 = 2020 - 79 + 15 + 79 - 15
= (45 - 45) + (15 - 15) + (55 + 55) = (-12 - 10) + (-21 + 21) + (23 - 23) = 2020 + (-79 + 79) + (15 - 15)
= 110 = -22 = 2020
7) -(515 - 80 + 91) - (2010 + 80 - 91) 8) 25 - (-17) + 24 - 12 9) 235 - (34 + 135) - 100
= -515 + 80 - 91 - 2010 - 80 + 91 = 25 + 17 + 24 - 12 = 235 - 34 - 135 - 100
= (-515 -2010) + (80 - 80) + (-91 + 91) = 54 = -34
= -2525
10) (13 + 49) - (13 - 135 + 49)
= 13 + 49 - 13 + 135 - 49
= (13 - 13) + (49 - 49) +135
= 135