các bạn giúp mình với nhé
bài 1.Thực hiện phép tính
a, 21.(-29)+(-17).(-13)
b,(-11)2.3 -[3-(-5)(-4)]
c,(-143):(-13)-(-5).(-12)
d,17-{(-32)-(-3)3-[5.(-41)-12:(-4)]+157}
Bài 3. Thực hiện phép tính:
a, 21.( – 29) + (– 17).( – 13) c, (– 143):(– 13) – (– 5).(– 12)
b, (– 11)2.3 – [3 – (– 5)( – 4)] d, 17 – {(– 32) – (–3) 3 – [5.(– 41) – 12:(– 4)0 ]+ 1571}
GSRDFDXHGDSGHFDFG
bt: thực hiện phép tính.
a)21 . ( - 29 ) + ( - 17 ) . ( - 13 ).
b) (-11)mũ 2 . 3 - [3 - ( - 5).(-4)].
c)( - 143 ) : ( - 13 ) - ( - 5 ) . ( - 12 ).
d) (-2)mũ 3 . (-8)+2 mũ 4.
giúp mk vs nha mn, thanks nhìu kkk:D
bạn ơi bạn cứ áp dụng công thức phép nhân hai số nguyên là sẽ thực hiện được những phép tính này
\(a)21\cdot(-29)+(-17)\cdot(-13)=(-609)+221=-388\)
\(b)(-11)^2\cdot3-\left[3-(-5)\cdot(-4)\right]\)
\(=121\cdot3-\left[3+5\cdot(-4)\right]\)
\(=363-\left[3+(-20)\right]\)
\(=363-(-17)=363+17=380\)
\(c)(-143):(-13)-(-5)\cdot(-12)\)
\(=11+5\cdot(-12)=11+(-60)=-49\)
Câu d tự làm
P/S : Hoq chắc :>
Bài 1.Thực hiện các phép tính sau:a)217 320 : 4;
b) 5025:5-25:5 ;
c) 218-180:2:9 ;
d)(328-8):32
Bài 2.Thực hiện phép tính.a) 27 . 75 + 25 . 27 –150
b)12 : { 400 : [500 –(125 + 25 . 7)]}
c) 13 . 17 –256 : 16 + 14 : 7 –1
d) 18 : 3 + 182 + 3.(51 : 17)
ko có bài 3 nhé!!
Bài 4.Thực hiện phép tínha) 375 : {32 –[ 4 + (5. 32–42)]} –14
b) {210 : [16 + 3.(6 + 3. 22)]} –3
Bài 1: Thực hiện các phép tính sau:
\(a)\)Chưa rỏ đề
\(b)\)\(5025\div5-25\div5\)
\(=\)\(1005-5\)
\(=\)\(1000\)
\(c)\)\(218-180\div2\div9\)
\(=\)\(218-10\)
\(=\)\(208\)
\(d)\)\(\left(328-8\right)\div32\)
\(=\)\(320\div32\)
\(=\)\(10\)
Bài 1:
a) ( Tôi không nhìn rõ đầu bài )
b) 5025 : 5 - 25 : 5
= ( 5025 - 25 ) : 5
= 5000 : 5
= 1000
c) 218 - 180 : 2 : 9
= 218 - 180 : ( 2 . 9 )
= 218 - 180 : 18
= 218 - 10
= 208
d) ( 328 - 8 ) : 32
= 320 : 32
= 10
Bài 2: Thực hiện phép tính:
\(a)\)\(27.75+25.27-150\)
\(=\)\(27.\left(75+25\right)-150\)
\(=\)\(27.100-150\)
\(=\)\(2700-150\)
\(=\)\(2550\)
\(b)\)\(12\div\left\{400\div\left[500-\left(125+25.7\right)\right]\right\}\)
\(=\)\(12\div\left\{400\div\left[500-\left(125+175\right)\right]\right\}\)
\(=\)\(12\div\left\{400\div\left[500-300\right]\right\}\)
\(=\)\(12\div\left\{400\div200\right\}\)
\(=\)\(12\div2\)
\(=\)\(6\)
\(c)\)\(13.17-256\div16+14\div7-1\)
\(=\)\(221-16+2-1\)
\(=\)\(206\)
\(d)\)\(18\div3+182+3.\left(51\div17\right)\)
\(=\)\(6+182+3.3\)
\(=\)\(6+182+9\)
\(=\)\(197\)
Thực hiện phép tính ( tính hợp lý nếu có thể )
-10/13 + 5/17 - 3/13 + 12/17 - 11/20
3/4 + -5/6 - 11/-12
Giúp mình với nhanh lênn please
-10/13 + 5/17 - 3/13 + 12/17 - 11/20 3/4 + -5/6 - 11/-12
(-10/13 - 3/13) + (5/17 + 12/17) - 11/20 3/4 - 5/6 - 11/-12
-13/13 + 17/17 - 11/20 9/12 - 10/12 - 1/-12
-1 + 1 - 11/20 -1/12 - -1/12
=-11/20 -1/12 + 1/12
=0
k cho mk nhé cảm ơn bạn rất nhiều
Thực hiện phép tính (Tính hợp lý nếu có thể)
a) -10/13 + 5/17 – 3/13 + 12/17 – 11/20
b) 3/4 + -5/6 – 11/-12
c) [13. 4/9 + 2. 1/9] – 3. 4/9
d) 1,25 : 15/20 + [25% – 5/6] : 4. 2/3
Tìm x, biết
a)x – 1/3 = 5/14 . -7/6
b) 3/4 + 1/4 x = 0,2
c) 1/12 .x2 = 1. 1/3
a; - \(\dfrac{10}{13}\) + \(\dfrac{5}{17}\) - \(\dfrac{3}{13}\) + \(\dfrac{12}{17}\) - \(\dfrac{11}{20}\)
= - (\(\dfrac{10}{13}\) + \(\dfrac{3}{13}\)) + (\(\dfrac{5}{17}\) + \(\dfrac{12}{17}\)) - \(\dfrac{11}{20}\)
= - 1 + 1 - \(\dfrac{11}{20}\)
= 0 - \(\dfrac{11}{20}\)
= - \(\dfrac{11}{20}\)
b; \(\dfrac{3}{4}\) + \(\dfrac{-5}{6}\) - \(\dfrac{11}{-12}\)
= \(\dfrac{9}{12}\) - \(\dfrac{10}{12}\) + \(\dfrac{11}{12}\)
= \(\dfrac{10}{12}\)
= \(\dfrac{5}{6}\)
c; [13.\(\dfrac{4}{9}\) + 2.\(\dfrac{1}{9}\)] - 3.\(\dfrac{4}{9}\)
= [\(\dfrac{52}{9}\) + \(\dfrac{2}{9}\)] - \(\dfrac{4}{3}\)
= \(\dfrac{54}{9}\) - \(\dfrac{4}{3}\)
= \(\dfrac{14}{3}\)
d; 1,25 : \(\dfrac{15}{20}\) + [25% - \(\dfrac{5}{6}\)] : 4.\(\dfrac{2}{3}\)
= 1,25 x \(\dfrac{20}{15}\) + [\(\dfrac{1}{4}\) - \(\dfrac{5}{6}\)] : 4.\(\dfrac{2}{3}\)
= \(\dfrac{5}{3}\) - \(\dfrac{7}{12}\) : 4 x \(\dfrac{2}{3}\)
= \(\dfrac{5}{3}\) - \(\dfrac{7}{48}\).\(\dfrac{2}{3}\)
= \(\dfrac{5}{3}\) - \(\dfrac{7}{72}\)
= \(\dfrac{113}{72}\)
Bài 1 Tính nhanh
a) -3/7 + 5/13 + 3/7
b) -5/21+-2/21+8/24
c) -5/11+(-6/11+2)
d) (-1/32+1/2)+15/32
e)5/17+ -6/13 + 3/4 + 7/-13+12/17
f) 7/23+-18/18+-4/9+16/23+-5/8
g)1/3+-3/4+3/5+-1/36+1/15+-2/9
h)-1/2+1/3+-1/4+-2/8+4/18+4/9
a)\(-\dfrac{3}{7}+\dfrac{5}{13}+\dfrac{3}{7}\)
=\(\left(-\dfrac{3}{7}+\dfrac{3}{7}\right)+\dfrac{5}{13}\)
=\(0+\dfrac{5}{13}\)
=\(\dfrac{5}{13}\)
1.thực hiện phép tính:
a,5/13 + -5/7 + -20/41 + 8/13 + -21/41
b,-5/7 . 2/11 + -5/7 . 9/11 +1
c, (4/5 + 1/2) . (3/13 - 8/13)
2. a, x + 4/7=7/11
b, -5/6 - x = 7/12 + -1/3
c,x - 1/4 = 5/8 . 2/3
d,x/126 = -5/9 . 4/7
giúp mik vs mn ơi, mik đnag cần rất gấp
1.thực hiện phép tính:
a, 24-{12-[(-10)-(-2)]}
b,2/3+1/3.(-2/3+5/6):2/3
2.tính nhanh:
a,\(-\frac{2}{5}+\left(-\frac{5}{9}+\frac{2}{5}\right)\)
b, 17/13-(4/13 - 11)
c,3/5.18/17+3/5.9/17-3/5.10/17
GIÚP IK GIÚP TUI VỚI! PLEASE
1/
a, 24 - {12 -[(-10)-(-2)]}
=24-{12-(-8)}
=24-20
=4
b,\(\frac{2}{3}\)+\(\frac{1}{3}\).(\(\frac{-2}{3}\)+\(\frac{5}{6}\)):\(\frac{2}{3}\)
=\(\frac{2}{3}\)+\(\frac{1}{3}\).(\(\frac{-4}{6}\)+\(\frac{5}{6}\)):\(\frac{2}{3}\)
=\(\frac{2}{3}\)+\(\frac{1}{3}\).\(\frac{1}{6}\).\(\frac{3}{2}\)
=\(\frac{2}{3}\)+\(\frac{1}{18}\).\(\frac{3}{2}\)
=\(\frac{2}{3}\)+\(\frac{1}{6}\).\(\frac{1}{2}\)
=\(\frac{2}{3}\)+\(\frac{1}{12}\)
=\(\frac{8}{12}\)+\(\frac{1}{12}\)
=\(\frac{9}{12}\)=\(\frac{3}{4}\)
2/
a,\(\frac{-2}{5}\)+(\(\frac{-5}{9}\)+\(\frac{2}{5}\))
=\(\frac{-2}{5}\)+\(\frac{-5}{9}\)+\(\frac{2}{5}\)
=(\(\frac{-2}{5}\)+\(\frac{2}{5}\))+\(\frac{-5}{9}\)
= 0+\(\frac{-5}{9}\)
= \(\frac{-5}{9}\)
a) -5/11 + ( -6/11 + 1 )
b) -13/17 + ( 13/-21 + -4/17 )
c) -5/12 . 7/-17 . 9/-20
d) 13/17 . 4/-5 + 13/17 . -3/4
e) -5/7 . 2/11 + -5/7 . 9/11 + 5/7
f) -2/5 . (-6) + 3/4 . 4/-10
a: =-5/11-6/11+1=-11/11+1=0
b: =-13/17-13/21-4/17=-1-13/21=-34/21
b: \(=-\dfrac{5}{12}\cdot\dfrac{9}{20}\cdot\dfrac{7}{17}=\dfrac{-21}{272}\)
d: \(=\dfrac{13}{17}\left(-\dfrac{4}{5}-\dfrac{3}{4}\right)=\dfrac{13}{17}\cdot\dfrac{-31}{20}=\dfrac{-403}{340}\)