Toán Lớp 5: Bài 4: Tìm x: d. X x 4/7 = 8/3 b. 2/5 : x = 1/3 c.x : 7/11 = 22 *, Tìm y

Question

Toán Lớp 5:  Bài 4: Tìm x: d. X x 4/7 = 8/3                                               b. 2/5 : x = 1/3                 c.x : 7/11 = 22 *, Tìm y ?  8/7 - y x 2/3 = 3/4                b. y x 4/6 + 3/4= 7/8 c. y x 2/3 + 5/4= 20/14.

haianhtu97 · Answer

~ Bạn tham khảo ~     B&agrave;i 4 :     d, x xx 4/7 = 8/3   x = 8/3 : 4/7   x = 8/3 . 7/4    x = 14/3   Vậy  x = 14/3    b, 2/5 : x = 1/3   x = 2/5 : 1/3   x = 2/5 . 3   x = 6/5   Vậy  x = 6/5    c ,x : 7/11 = 22   x = 22 xx 7/11   x = 154/11   x = 14   Vậy  x = 14   B&agrave;i 5 :    8/7 - y xx 2/3  = 3/4   y xx 2/3 = 8/7 - 3/4    y xx 2/3 = 11/28    y = 11/28 : 2/3   y = 11/28 xx  3/2   y = 33/56   Vậy  y = 33/56   b, y xx 4/6 + 3/4 = 7/8   y xx 4/6 = 7/8 - 3/4   y xx 4/6 = 1/8   y = 1/8 : 4/6   y = 1/8 xx 6/4   y = 3/16   Vậy  y = 3/16   c, y xx 2/3 + 5/4 = 20/14    y xx 2/3 = 10/7 - 5/4   y xx 2/3 = 5/28   y = 5/28 : 2/3   y = 5/28 xx 3/2   y = 15/56   Vậy  y = 15/56

lanhuongthu · Answer

Giải đáp + Lời giải và giải thích chi tiết:   B&agrave;i 4 :   b) 2/5:x=1/3   x=2/5:1/3   x=2/5 xx 3=6/5   Vậy x = 6/5   c) x:7/11=22   x=22 xx 7/11   x=14   Vậy x = 14   d) x xx 4/7=8/3   x=8/3:4/7   x=8/3xx7/4   x=14/3   Vậy x = 14/3   a) 8/7-yxx2/3=3/4   y xx2/3=8/7-3/4   y xx 2/3=11/28   y = 11/28:2/3   y=11/28xx3/2   y=33/56   Vậy y = 33/56   b) y xx 4/6+3/4=7/8   y xx4/6=7/8-3/4   y xx 4/6=7/8-6/8   y xx 4/6=1/8   y = 1/8:4/6   y = 1/8xx6/4   y = 3/16   Vậy y = 3/16   c) y xx 2/3+5/4=20/14   y xx2/3+5/4=10/7   y xx 2/3=10/7-5/4   y xx 2/3=5/28   y = 5/28:2/3   y = 5/28 xx 3/2   y = 15/56   Vậy y = 15/56.