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

Toán Lớp 5: Tính : $\frac{9×25}{75×36}$ ==-… $\frac{54×35}{45×81}$ ==-.. $\frac{15}{42}$x$\frac{30}{45}$x1$\frac{5}{

Home/ Toán Lớp 5: Tính : $\frac{9×25}{75×36}$ ==-… $\frac{54×35}{45×81}$ ==-.. $\frac{15}{42}$x$\frac{30}{45}$x1$\frac{5}{

Toán Lớp 5: Tính : $\frac{9×25}{75×36}$ ==-… $\frac{54×35}{45×81}$ ==-.. $\frac{15}{42}$x$\frac{30}{45}$x1$\frac{5}{

Tháng Chín 7, 2022 Toán học 2 Comments 0 views

Toán Lớp 5: Tính :
$\frac{9×25}{75×36}$ =……………….
$\frac{54×35}{45×81}$ =………………
$\frac{15}{42}$x$\frac{30}{45}$x1$\frac{5}{16}$

Comments ( 2 )

  1. minhtuyethue
    minhtuyethue
    7 Tháng Chín, 2022 at 6:19 sáng
    Reply
    a) $\frac{9 . 25}{75. 36}$ = $\frac{3 . 3 . 25}{25 . 3 . 2 . 3 . 6}$ = $\frac{1}{2 . 6}$ = $\frac{1}{12}$
    b) $\frac{54 . 35}{45 . 81}$ = $\frac{9 . 2 . 3 . 7 . 5}{9 . 5 . 3 . 3 . 9 }$ = $\frac{2 . 7}{3 . 9}$ = $\frac{14}{27}$
    c) $\frac{15}{42}$ . $\frac{30}{45}$ . 1$\frac{5}{16}$ = $\frac{15}{42}$ . $\frac{30}{45}$ . $\frac{1 . 16 + 5}{16}$ = $\frac{15}{42}$ . $\frac{30}{45}$ . 1$\frac{21}{16}$ = $\frac{15 . 30 . 21}{42 . 45 . 16}$ = $\frac{15 . 6 . 5 . 7 . 3}{7 . 6 . 15 . 3 . 16}$ = $\frac{5}{16}$

  2. haianhtu97
    haianhtu97
    7 Tháng Chín, 2022 at 6:18 sáng
    Reply
    $#MiziChannel$
    a) (9×25)/(75×36) = (1×1)/(3×4) = 1/12
    b) (54×35)/(45×81) = 1890/3645 = 14/27
    c) 15/42 × 30/45 × 1 5/16 = 15/42 × 30/45 × 21/16 = 9450/30240 = 5/16
     

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

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