(13x1714+ 4x1714) :1713 -(14x 9- 14x5):8
9+18x25-333x8-554:2+14x5+692x20+9-32940=? Giải giùm thằng em của tôi!!!!!!!!!!!!!!!!!!!!!
mk đang vội nên giúp bn bt KQ thôi nha
ĐS=-21503
25×(-8)2 -140 : [42 + 7×(-2)2]-176×179:1713
= 25 x 64 - 140 : 70 - \(17^{6+9-13}\)
= 1600 - 2 - 289 = 1309
tính hợp lí
-11/7 + 13/-2 + -6/17
13/-8 + -7/20 +3/-8
-4/7 + 11/5 + 1/5 + -7/3
\(#N\)
\(-\dfrac{11}{7}+\dfrac{13}{-2}+-\dfrac{6}{17}=-\dfrac{113}{14}+-\dfrac{6}{17}=-\dfrac{2005}{238}\)
\(\dfrac{13}{-8}+-\dfrac{7}{20}+\dfrac{3}{-8}=\left(-\dfrac{13}{8}+-\dfrac{3}{8}\right)+-\dfrac{7}{20}=-2+-\dfrac{7}{20}=-\dfrac{47}{20}\)
\(-\dfrac{4}{7}+\dfrac{11}{5}+\dfrac{1}{5}+-\dfrac{7}{3}=-\dfrac{4}{7}+\left(\dfrac{11}{5}+\dfrac{1}{5}\right)+-\dfrac{7}{3}=-\dfrac{4}{7}+\dfrac{12}{5}+-\dfrac{7}{3}=-\dfrac{53}{105}\)
tính :
14x5=
Tính:
17 13 ÷ 51 26
Tính: 17 13 : 51 26
17 13 : 51 26 = 17 x 26 13 x 51 = 17 x 13 x 2 13 x 17 x 3 = 2 3
Tính( dấu gạch chân = dấu chia
4*9 x 9*4 - 10x 6*9
2*14x 3*8 +6*8 x 28
\(\sqrt{14x-1}+\sqrt{15x-2}=\sqrt{4x+9}\sqrt{5x+8}\)
1:
1). 2x-3=11-5x
2). 0,5(2x-9)=1,5x(x-5)
3). 28(x-1)-9(x-2)=14x
4). 8(3x-2)-14x=2(4-7x)+18x
5). 2(x-5)-6(1-2x)=3x+2
6). 2x-3=3(x-1)+x+2
1)2x-3=11-5x
2x+5x=11+3
7x =14
x=2.