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: bài 1 : a, 45 x 113 + 45 x 113 + 113 b,54 x 47 – 47 x 53 – 20 – 27 c, ( 145 x 99 + 145 ) – ( 143 x 101 – 143)

Home/ Toán Lớp 5: bài 1 : a, 45 x 113 + 45 x 113 + 113 b,54 x 47 – 47 x 53 – 20 – 27 c, ( 145 x 99 + 145 ) – ( 143 x 101 – 143)

Toán Lớp 5: bài 1 : a, 45 x 113 + 45 x 113 + 113 b,54 x 47 – 47 x 53 – 20 – 27 c, ( 145 x 99 + 145 ) – ( 143 x 101 – 143)

Tháng Hai 10, 2023 Toán học 2 Comments 0 views

Toán Lớp 5: bài 1 :
a, 45 x 113 + 45 x 113 + 113
b,54 x 47 – 47 x 53 – 20 – 27
c, ( 145 x 99 + 145 ) – ( 143 x 101 – 143)

Comments ( 2 )

  1. mytamhoang
    mytamhoang
    10 Tháng Hai, 2023 at 7:40 chiều
    Reply
    a,
    45 × 113 + 45 × 113 + 113
    = (45 + 45 + 1) × 113
    = 91 × 113
    = 10283
    b,
    54 × 47 – 47 × 53 – 20 – 27
    = 54 × 47 – 47 × 53 – (20 + 27)
    = 54 × 47 – 47 × 53 – 47
    = (54 – 53 – 1) × 47
    = 0 × 47
    = 0
    c,
    (145 × 99 + 145) – (143 × 101 – 143)
    = [145 × (99 + 1)] – [143 × (101 – 1)]
    = 145 × 100 – 143 × 100
    = (145 – 143) × 100
    = 2 × 100
    = 200

  2. kymmailien
    kymmailien
    10 Tháng Hai, 2023 at 7:39 chiều
    Reply
    a) 45 xx 113 + 45 xx 113 + 113
    = 113 xx ( 45 + 45+ 1)
    = 113 xx 91
    = 10283
    ———————————–
    b) 54 xx 47 – 47 xx 53 – 20 – 27
    = 54 xx 47 – 47 xx 53 – ( 20 + 27)
    = 54 xx 47 – 47 xx 53 – 47
    = 47 xx ( 54 – 53 – 1)
    = 46 xx 0
    = 0
    —————————————-
    c) ( 145 xx 99 + 145) – (143 xx 101 – 143)
    = ( 145 xx 99 + 145 xx 1) – ( 143 xx 101 – 143 xx 1)
    = [145 xx ( 99 + 1) ] – [143xx ( 101 – 1)]
    = [ 145 xx 100] – [ 143 xx 100]
    = 14500 – 14300
    = 200

Leave a reply

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

Kim Xuân

About Kim Xuân