\(\dfrac{-15}{32}:\dfrac{5}{48}-\dfrac{11}{10}\\ =\dfrac{-15}{32}.\dfrac{48}{5}-\dfrac{11}{10}\\ =\dfrac{-9}{2}-\dfrac{11}{10}\\ =\dfrac{-45}{10}-\dfrac{11}{10}\\ =\dfrac{-45-11}{10}\\ =\dfrac{-56}{10}\\ =\dfrac{-28}{5}\)
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
Tìm số tự nhiên x biết:
a) x - 32 : 16 = 48 b) 88 - 3 . 7 + x = 64
c) 5 + 4 x : 3 - 121 : 11 = 4 d) 15 - 2 3 x + 1 = 11 . 13 - 130
Tìm số tự nhiên x biết:
a) x – 32 : 16 = 48
b) 88 – 3.(7+x) = 64
c) (5+4x) : 3 – 121 : 11 = 4
d) 15 – 2(3x+1) = 11.13 – 130
Bài 1)Mẫu: -(-5) + (-12)
=5+(-12)
= (-7)
1) -(-17) - |-5|
2) - |+12| + (-14)
3) -(+15) + |-7|
4) (-9) + -(-13)
5) - (-12) + 0
6) - (-15) + (-15)
7) -(-27) - (+27)
8) - (-13) - |-13|
9) - |-13| - |-17|
10) |-25| + |-17|
11) -18 + |-5|
12) |-20| - (-27)
13) - |-32| - (+15)
14) - (-25) - |-48|
Giúp mik đi bài này mik ngu lẳm
125-(-75)+32-(48+32)
47.347+247.(-47)
40.(45-135)-40.(45+65)
x-10=-14
15+x =13
25.x =-75
5x-16=-46
3.x-(-11)=-4
jup mik nhoa :(( mik ngao toan lam :((
2x - (-17+x)=15-32
45-(x-11) =(-48) - 2x
17-(20-|x| ) = 117
Bài 1. Thực hiện phép tính:
a) [(10 – 22 – 32 : 2]. 3 – 48 : 2
b) 4 (-5) + 49 : (-7) + 19
Bài 2. Tìm x, biết:
a) (x – 14) : 5 = 415 : 413.
b) 7x – 15x = 15 – 175
Mik sẽ tick
Rút gọn các phân số sau:
a ) ( − 3 ) .8 8.6 ; b ) ( − 7 ) .13 7. ( − 13 ) ; c ) ( − 5 ) .11 ( − 10 ) . ( − 11 )
d ) ( − 14 ) . ( − 5 ) 10.14 ; e ) ( − 14 ) . ( − 15 ) ( − 5 ) .21 ; f ) ( − 32 ) . ( − 9 ) .3 6.27.8
1+2+3+4+5+6+7+8+9+10+11+12+13+14+15+16+17+18+19+20+30+31+32+32+...+1000000
