Các câu hỏi tương tự
Bai 1
Thuc hien phep tinh
a,(135-35) .(-47)+53 .(-48-52)
b,25 .(75-49)+75 .|25-49|
Bai 2
Tim x\(\varepsilon\)Z biet
a,(-x+31)-39=-69+11
b,x-{57-[42+(-23-x)]}=13-{47+[25-(32-x)]}
c,|2-x|+2=x
Giup minh voi
Bai 1 : Thuc hien phep tinh :
a ) 5 ^ 20 : ( 5^15 . 6 + 5^15 . 19 )
Minh can gap ,ai nhanh minh se tick cho nha .
(-48).19 + (-48) . 115 - 134 . 52
THUC HIEN PHEP TINH ( TINH NHANH NEU CO THE ) :
1) ( 56 x 46 - 25 x 23 ) : 23
2) ( 28 x 54 + 56 x 36 ) : 21 : 2
3) ( 76 x 34 - 19 x 64 ) : ( 38 x 9 )
4) ( 2 + 4 + 6 + .... + 100 ) x ( 36 x 333 - 108 x 111 )
5) ( 5x 411 - 3 x 165 ) : 410
6) 7256 x 4375 - 725
3650 + 4375 x 7255
tính nhanh 48 . 19 + 48 . 115 + 134 . 52
48*18+48*115+134*52+87*23+13*93+70*87
bai 1, thuc hien phep tru
a, (a-1)-(a-3)
b, (2+b)-(b+1)
c, -(1-2)+(5-c)
d, -(a-c)-(a-b+c)
bai 2, tim x, biet
a, -x+8= -17
b, 35-x=37
c, -19-x= -20
d, 2130-(x+130)+72= -64
giup minh voi, minh can gap, cam on cac ban nhieu
tính hợp lí
48 . 19 + 48 . 115 + 134 . 52
17 tháng 9 2021 lúc 16:31
a) 80 - (4.52 - 3.23 )
b) 5 6 : 54 + 23 .22 - 1 2019
c) 125 - 2.[56 - 48 : (15 - 7)]
d) 23.75 + 25.10 + 25.13 + 180
e) 2448: [119 -(23 -6)]
f) [36.4 - 4.(82 - 7.11)2 : 4 - 20160