13(26-58)-26(13+21)
29/13*26/58*4*43/14*8/21
bằng mấy ?
tính:
\(2\dfrac{3}{13}\) x \(\dfrac{26}{58}\) x 4 x \(2\dfrac{15}{24}\) x \(\dfrac{8}{21}\)
\(=\dfrac{29}{13}\cdot\dfrac{13}{29}\cdot4\cdot\dfrac{21}{8}\cdot\dfrac{8}{21}=4\)
tính:
\(2\dfrac{3}{13}\) x \(\dfrac{26}{58}\) x 4 x \(2\dfrac{15}{24}\) x \(\dfrac{8}{21}\)
bài này mik ra \(\dfrac{39}{29}\) ko bt đúng ko :)
Bài 1:
a,13* 58 *4 + 32 * 26 * 2+52 *10
b, 15* 37 * 4+120 *21 *+ 21* 5 *12
\(2\frac{3}{13}.\frac{26}{58}.4.2\frac{15}{24}.\frac{8}{21}=?\)
3.(-4)^2+2.(-5)-20
(-54)+(+39)-(+10)+(-85
5.(3)^2-14.(-8)+(-40)
(-24)+(-30)-(-40)
31-[26-(209+26)]
29-(-25)+(+40)
231+26-(209+26) BÀI TẬP TẾT NHIỀU QUÁ MONG MN
215+(-38)-(-58)+90-85 GIÚP ĐỠ THANK..........
21+22+23+24-11-12-13-14
215+(-38)-(-58)-(-58)-15
tính
a)1/1/24*5*2/5*2
b)2/3/13*26/58*4*2/15/24*8/21
\(2\frac{3}{13}\times\frac{26}{58}\times4\times2\frac{15}{24}\times\frac{8}{21}\)
\(2\frac{3}{13}\cdot\frac{26}{58}\cdot4\cdot2\frac{15}{24}\cdot\frac{8}{21}=\frac{29}{13}\cdot\frac{26}{58}\cdot4\cdot\frac{21}{8}\cdot\frac{8}{21}=\frac{29\cdot26\cdot4\cdot21\cdot8}{13\cdot58\cdot8\cdot21}=\frac{1\cdot2\cdot4\cdot1\cdot1}{1\cdot2\cdot1\cdot1}=\frac{1\cdot4}{1}=4\)
Tính nhanh
1) 13 x 58 x 4 + 32 x 26 x 2 + 52 x 10
2) 15 x 37 x 4 + 120 x 21 + 21 x 5 x 12
1/13.58.4+32.26.2+52.10
=52.58+52.32+52.10
=52(58+32+10)=52.100=5200
2/15.37.4+120.21+21.5.12
=60.37+120.21+60.21
=60(37+2.21+21)=60.100=6000
= 52 (58 + 32 +10 ) =52 x 100 =5200