Toán Lớp 6: a, 8 2/3+3,5 b,18 2/17+15/23+1 15/17+3/19+8/23 c, -2 2/3-0,2+1,75-5/6+0,7 d,(19/21-2/3).2,8 e, 3/11.(2 2/3-1,75) f,(3/4+0,5).(4/5-

Question

Toán Lớp 6:  a, 8  2/3+3,5 b,18  2/17+15/23+1  15/17+3/19+8/23 c, -2  2/3-0,2+1,75-5/6+0,7 d,(19/21-2/3).2,8 e, 3/11.(2  2/3-1,75) f,(3/4+0,5).(4/5-0,6) g, 3  2/5.6  1/4+3  2/5.3  3/4 h, 3  1/9.12  5/7-9  5/7.3  1/9 i, 3,2.15/64-(4/5+2/3)3  2/3

diemchau · Answer

a) 8.2/3+3,5=8.2/3+7/2=16/3+7/2=53/6   b) 18.2/17+15/23+1.15/17+3/19+8/23=36/17+15/23+15/17+3/19+8/23=(36/17+15/17)+(15/23+8/23)+3/19=3+1+3/19=79/19   c)-2.2/3-0,2+1,75-5/6+0,7=-2.2/3-1/5+7/4-5/6+7/10=-4/3-1/5+7/4-5/6+7/10=1/12   d) (19/21-2/3).2,8=(19/21-2/3).14/5=5/21.14/5=2/3   e)3/11.(2.2/3-1.75)=3/11.(4/3-1/75)=3/11.33/25=9/25   f)(3/4+0.5).(4/5-0,6)=(3/4+1/2).(4/5-3/5)=5/4.1/5=1/4   g)3.2/5.6.1/4+3.2/5.3.3/4=3.1/15.1/4+3.2/5.3.3/4=1/5.1/4+6/5.9/4=11/4   C&ograve;n lại bạn tự l&agrave;m nốt. B&agrave;i mik ở tr&ecirc;n c&oacute; một số chỗ mik bấm m&aacute;y t&iacute;nh l&agrave;m tắt mong bạn thong cảm!