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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$\frac{5}{16}$

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. a) $\frac{9×25}{25×36}$ = $\frac{25x}{25x}$x $\frac{9}{36}$ = $\frac{1}{4}$ 
    b) $\frac{54×35}{45×81}$ = $\frac{54.35}{45.81}$ = $\frac{1890}{3645}$ = $\frac{14}{27}$
    c$\frac{15}{42}$ x $\frac{30}{45}$ x 1$\frac{5}{16}$ = $\frac{15}{42}$ x $\frac{30}{45}$ x $\frac{21}{16}$ = $\frac{9450}{30240}$ = $\frac{5}{16}$

  2. $#MiziChannel$
    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 = ? ( )