Register Now

Login

Lost Password

Lost your password? Please enter your email address. You will receive a link and will create a new password via email.

222-9+11+12:2*14+14 = ? ( )

Toán Lớp 5: Tính a)2/3+3/4+5/6 b)1/2+4/5-12/25 c)5/6x(4/15+2/3) d)13/9:5/6:7/15

Home/ Toán Lớp 5: Tính a)2/3+3/4+5/6 b)1/2+4/5-12/25 c)5/6x(4/15+2/3) d)13/9:5/6:7/15

Toán Lớp 5: Tính a)2/3+3/4+5/6 b)1/2+4/5-12/25 c)5/6x(4/15+2/3) d)13/9:5/6:7/15

Tháng Tám 2, 2022 Toán học 2 Comments 0 views

Toán Lớp 5: Tính
a)2/3+3/4+5/6
b)1/2+4/5-12/25
c)5/6x(4/15+2/3)
d)13/9:5/6:7/15

Comments ( 2 )

  1. doanthulan
    doanthulan
    2 Tháng Tám, 2022 at 12:21 chiều
    Reply
    a) 2/3 + 3/4 + 5/6 
    = 8/12 + 9/12 + 10/12
    = (8+9+10)/12
    = 27/12 = 9/4
    b) 1/2 + 4/5 – 12/25
    = 25/50 + 40/50 – 24/50 
    = (25+40-24)/50
    = 41/50
    c) 5/6 × (4/15+2/3)
    = 5/6 × (4/15+10/15)
    = 5/6 × 14/15
    = (5×14)/(6×15)
    = 70/90 = 7/9
    d) 13/9 ÷ 5/6 ÷ 7/15
    = 13/9 × 6/5 × 15/7
    = (13×6×15)/(9×5×7)
    = 1170/315 = 26/7

  2. khanhngantoan
    khanhngantoan
    2 Tháng Tám, 2022 at 12:21 chiều
    Reply
    a, 2/3 + 3/4 + 5/6
    = 6/12 + 9/12 + 10/12
    = 25/12
    b, 1/2 + 4/5  – 12/25
    = 25/50 + 40/50 – 24/50
    = 41/50
    c, 5/6 . ( 4/15 + 2/3)
    = 5/6 .( 4/15 + 10/15)
    = 5/6 . 14/15
    =7/9
    d, 13/9 : 5/6 : 7/15
    = 13/9 . 6/5 : 7/15
    = 26/15 : 7/15
    = 26/15 . 15/7
    = 26/7
     

Leave a reply

222-9+11+12:2*14+14 = ? ( )

Băng

About Băng