Bỏ ngoặc rồi tính:
a) -7264 + (1543 + 7264) b) (144 - 97) - 144 c) (-145) - (18 - 145)
d) 111 + (-11 + 27) e) (27 + 514) - (486 - 73) f) (36 + 79)+ (145 - 79 - 36)
a: \(-7264+\left(1543+7264\right)\)
\(=-7264+1543+7264\)
\(=\left(-7264+7264\right)+1543\)
=0+1543
=1543
b: \(\left(144-97\right)-144\)
\(=144-97-144\)
\(=\left(144-144\right)-97\)
=0-97
=-97
c: \(\left(-145\right)-\left(18-145\right)\)
\(=-145-18+145\)
\(=\left(-145+145\right)-18\)
=0-18
=-18
d: \(111+\left(-11+27\right)\)
\(=\left(111-11\right)+27\)
=100+27
=127
e: \(\left(27+514\right)-\left(486-73\right)\)
\(=27+514-486+73\)
\(=\left(27+73\right)+\left(514-486\right)\)
\(=100+28=128\)
f: \(\left(36+79\right)+\left(145-79-36\right)\)
\(=36+79+145-79-36\)
\(=\left(36-36\right)+\left(79-79\right)+145\)
=0+0+145
=145
Bài 2: Bỏ ngoặc rồi tính
1) -7264 + (1543 + 7264)
2) (144 – 97) – 144
3) (-145) – (18 – 145)
4) 111 + (-11 + 27)
5) (27 + 514) – (486 – 73)
6) (36 + 79) + (145 – 79 – 36)
7) 10 – [12 – (- 9 - 1)]
8) (38 – 29 + 43) – (43 + 38)
9) 271 – [(-43) + 271 – (-17)] 10) -144 – [29 – (+144) – (+144)]
1)-7264+(1543+7264)=-7264+1543+7264=1543
2)(144-97)-144=144-97-144=-97
3)(-145)-(18-145)=-145-18+145=-18
4)111+(-11+27)=111-11+27=100+27=127
5)(27+514)-(486-73)=27+514-486-73=541-486-73=55-73=-18
6)(36+79)+(145-79-36)=36+79+145-79-36=145
7)10-[12-(-9-1)]=10-[12+9+1]=10-12-9-1=-12
8)(38-29+43)-(43+38)=38-29+43-43-38=-29
9)271-[(-43)+271-(-17)]=271-[-43+271+17]=271+43-271-17=43-17=26
10)-144-[29-(+144)-(+144)]=-144-[29-144-144]=-144-29+144+144=-29+144=115
Bỏ ngoặc rồi tính :
1/ -7264 + (1543 + 7264)
2/ ( 144 - 97 ) - 144
3/ ( -145 ) - (18 - 145 )
4/ 111 + ( -11 + 27 )
5/ ( 27 + 514 ) - ( 486 - 73 )
6/ ( 36 + 79 ) + ( 145 - 79 - 36 )
7/ 10 - [ 12 - ( -9 - 1 ) ]
8/ ( 38 - 29 + 43 ) - (43 + 38 )
9/ 271 - [ (-43 ) + 271 - (-17 ) ]
10/ -144 - [ 29 - ( +144 ) - ( +144 )
mk ko ghi lại đề bài nha bạn
1. =-7624+1543+7264 = (-7264+7264)+1543
= 0+1543
= 1543
2. = 144 - 97 - 144 = ( 144 -144 ) -97
= 0-97
= 0+ (-97)
= -97
3. = -145 - 18 + 145 = (-145+145)-18
= 0-18
= 0+ (-18)
= -18
4. = 111+ (-11) + 27 = [ 111+ (-11) ] +27
= 100+27
= 127
5. = 27+ 514 - 486 + 73 = ( 27+ 73) + ( 514 - 486)
= 100 + 28
= 128
6. = 36 + 79 +145 -79 -36 = ( 36-36)+(79-79)+145
= 0+0+145
= 145
7. = 10-12-(-9)+1 = 10 + (-12) + 9 +1
= (10+9+1) +(-12)
= 20+(-12)
= 8
8. = 38 -29 +43 -43 -38 =(38-38)+(43-43)-29
= 0+0 -29
= 0+ (-29)
= -29
9. = 271 - (-43) -271 - (-17)=271+43-271+17
= (271-271) + ( 43 +17)
= 0+ 60
= 60
10. = -144 - 29 + (-144) + (-144) = -144 + (-29) + (-144) +(-144)
= [-144 + (-144)+ (-144)] + (-29)
= -144 x3 + (-29)
= -432 + (-29)
= -461
k mk nha bạn
Bài toán 5: Bỏ ngoặc rồi tính
a. -7264 + (1543 + 7264) b. (144 – 97) – 144
c. (-145) – (18 – 145) d. 111 + (-11 + 27)
e. (27 + 514) – (486 – 73) g. (36 + 79) + (145 – 79 – 36)
h. 10 – [12 – (- 9 - 1)] i. (38 – 29 + 43) – (43 + 38)
k. 271 – [(-43) + 271 – (-17)] l. -144 – [29 – (+144) – (+144)]
a. -7264 + (1543 + 7264)
= -7264 + 1543 + 7264
=( -7264 + 7264) +1543
=1543
b. (144 – 97) – 144
=144-97-144
= (144-144)-97
= -97
c. (-145) – (18 – 145)
= -145 -18 + 145
= (-145+145)-18
=-18
d. 111 + (-11 + 27)
=111+(-11)+27
=( 111-11)+27
=100+27
=127
e. (27 + 514) – (486 – 73)
= 27+514-(-486)+73
= (27+73)+(514+486)
= 100+1000=1100
g. (36 + 79) + (145 – 79 – 36)
= 36+79+145-79-36
= (36-36)+(79-79)+145
=145
mik làm đc nửa thui nha vì mình bận r
-7264+(1543+7264)
(144-97)-144
(-145)-(18-145)
111+(-11+27)
(27+514)-(486-73)
(36+79)+(145-79-36)
10-[12-(-9-1)]
(38-29+43)-(43+38)
271-[(-43+271-(-17)]
-144-[29-(+144)-(+144)]
1; - 7264 + (1543 + 7264)
= - 7264 + 1543 + 7264
= (-7264 + 7264) + 1543
= 0 + 1543
= 1543
2; (144 - 97) - 144
= 144 - 97 - 144
= (144 - 144) - 97
= 0 - 97
= - 97
3; (-145) - (18 - 145)
= - 145 - 18 + 145
= (-145 + 145) - 18
= 0 - 18
= - 18
lại 2 câu dễ để các bạn lấy like nè :
câu 1: bỏ ngoặc rồi tính
1/ -7264+(1543+7264)
2/ (144-97)-144
3/ (-145)-(18-145)
4/ 111+(-11+27)
5/ (27+514)-(486-73)
6/ (36+79)+(145-79-36)
7/ 10-[12-(-9-1)]
8/ (38-29+43)-(43+38)
9/ 271-[(-43)+271-(-17)]
10/ -144-[29-(+144)-(+144)]
1/ - 7264 + ( 1543 + 7264 )
= - 7264 + 1543 + 7264
= ( - 7264 + 7264 ) + 1543
= 0 + 1543
= 1543
2/ ( 144 - 97 ) - 144
= 144 - 97 - 144
= ( 144 - 144 ) - 97
= 0 - 97
= - 97
3/ ( - 145 ) - ( 18 - 145 )
= - 145 - 18 - 145
= ( - 145 - 145 ) - 18
= ( - 290 ) - 18
= - 308
Thế thôi nhé
1/ - 7264 + ( 1543 + 7264 )
= - 7264 + 1543 + 7264
= ( - 7264 + 7264 ) + 1543
= 0 + 1543
= 1543
K mk nha
1 bài nha
Làm hết chắc mk chết
Làm rõ nhiều bài
Suy nghĩ đi chứ
Chưa chi đã hỏi
BÀI 2: BỎ NGOẶC RỒI TÍNH (ghi rõ từng bước của phép tính)
1) -7264 + (1543 + 7264)
2) (144 – 97) – 144
3) (-145) – (18 – 145)
4) 111 - (-11 + 107)
5) (27 + 514) – (486 – 73)
6) (36 + 79) + (145 – 79 – 36)
1) - 7264 + ( 1543 + 7264 )
= ( - 7264 + 7264 ) + 1543
= 0 + 1543
= 1543
2) ( 144 - 97 ) - 144
= ( 144 - 144 ) - 97
= 0 - 97
= - 97
3) ( - 145 ) - ( 18 - 145 )
= ( - 145 + 145 ) - 18
= 0 - 18
= - 18
4) 111 - ( - 11 + 107 )
= ( 111 + 11 ) + 107
= 122 + 107
= 229
5) ( 27 + 514 ) - ( 486 - 73 )
= ( 27 + 73 ) + ( 514 - 486 )
= 100 + 28
= 128
6) ( 36 + 79 ) + ( 145 - 79 - 36 )
= ( 36 - 36 ) + ( 79 - 79 ) + 145
= 0 + 0 + 145
= 145
1) - 7264 + ( 1543 + 7264 )
= ( - 7264 + 7264 ) + 1543
= 0 + 1543
= 1543
2) ( 144 - 97 ) - 144
= ( 144 - 144 ) - 97
= 0 - 97
= - 97
3) ( - 145 ) - ( 18 - 145 )
= ( - 145 + 145 ) - 18
= 0 - 18
= - 18
4) 111 - ( - 11 + 107 )
= ( 111 + 11 ) + 107
= 122 + 107
= 229
5) ( 27 + 514 ) - ( 486 - 73 )
= ( 27 + 73 ) + ( 514 - 486 )
= 100 + 28
= 128
6) ( 36 + 79 ) + ( 145 - 79 - 36 )
= ( 36 - 36 ) + ( 79 - 79 ) + 145
= 0 + 0 + 145
= 145
Bỏ ngoặc rồi tinh
1/ -7264+(1543+7264)
2/ (144-97)-144
3/(-145)-(18-145)
4/ 111+(-11+27)
5/(27+514)-(486-73)
6/(36+79)+(145-79-36)
7/10-[12-(-9-1)]
8/(38-29+43)-(43+38)
9/271-[(-43)+271-(-17)]
10/-144-[29-(+144)-(+144)]
1) - 7264 + ( 1543 + 7264 )
= - 7264 + 1543 + 7264
= ( - 7264 + 7264 ) + 1543
= 0 + 1543
= 1543
2) ( 144 - 97 ) - 144
= 144 - 97 - 144
= ( 144 - 144 ) - 97
= 0 - 97
= - 97
3) ( - 145 ) - ( 18 - 145 )
= -145 - 18 + 145
= ( - 145 + 145 ) - 18
= 0 - 18
= - 18
4) 111 + ( - 11 + 27 )
= 111 - 11 + 27
= 100 + 27
= 127
các câu còn lại bn tự làm nha
1. -7264+(1543+7264)
=-7264+1543+7264
=[-7264+7264]+1543
=0
1,-7264+(1543+7264)=-7264+1543+7264=(-7264+7264)+1543=0+1543=1543
2,(144-97)-144=144-97-144=(144-144)-97=0-97=-97
3,(-145)-(18-145)=-145-18+145=(-145+145)-18=0-18=-18
4,111+(-11+27)=111-11+27=100+27=127
5,(27+514)-(486-73)=27+514-486+73=(27+73)+(514-486)=100+28=128
6,(36+79)+(145-79-36)=36+79+145-79-36=(36-36)+(79-79)+145=0+0+145=145
7,10-[12-(-9-1)]=10-[12+9+1]=10-12-9-1=10-10-12=0-12=-12
8,(38-29+43)-(43+38)=38-29+43-43-38=(38-38)+(43-43)-29=0+0-29=-29
9,271-[(-43)+271-(-17)]=271-[-43+271+17]=271+43-271-17=(271-271)+(43-17)=0+26=26
10,-144-[29-(+144)-(+144)]=-144-[29-144-144]=-144-[29-144-144]=-144-29+144+144=(-144+144)+(144-29)=0+115=115
Bài 1: Bỏ ngoặc rồi tính
1/ -7264 + (1543 + 7264)
2/ (144 – 97) – 144
3/ (-145) – (18 – 145)
4/ 111 + (-11 + 27)
5/ (27 + 514) – (486 – 73)
6/ (36 + 79) + (145 – 79 – 36)
7/ 10 – [12 – (- 9 - 1)]
8/ (38 – 29 + 43) – (43 + 38)
9/ 271 – [(-43) + 271 – (-17)]
10/ -144 – [29 – (+144) – (+144)]
1/ -7264 + (1543 + 7264)
= -7264 + 7264 + 1543
= 0 + 1543 = 1543
2/ (144 - 97) - 144
= 144 - 144 - 97
= 0 - 97 = -97
3/ -145 - (18 - 145)
= -145 + 145 - 18
= 0 - 18 = 18
4/ 111 + (-11 + 27)
= 111 - 11 + 27
= 100 + 27 = 127
5/ (27 + 514) - (486 - 73)
= 27 + 514 - 486 + 73
= 27 + 73 + 514 - 486
= 100 + 28
= 28
6/ (36 + 79) + (145 - 79 - 36)
= 36 + 79 + 145 - 79 - 36
= 36 - 36 + 79 - 79 + 145
= 145
7/ 10 - [12 - (-9 - 1)]
= 10 - (12 + 9 + 1)
= 10 - (12 + 10)
= 10 - 10 - 12
= -12
8/ (38 - 29 + 43) - (43 + 38)
= 38 - 29 + 43 - 43 - 38
= 38 - 38 + 43 - 43 - 29
= -29
9/ 271 - [(-43) + 271 -(-17)]
= 271 - (-43 + 271 + 17)
= 271 + 43 - 271 - 17
= 43 - 17 = 26
10/ -144 - [29 - (+144) - (+144)]
= -144 - 29 + 144 + 144
= -29 + 144
= 115
