Câu 1 trang 70 VBT Toán 4 - Kết nối tri thức: >; <; = ?So sánh hai phân số rồi điền dấu thích hợp.a) frac{{24}}{{173}} < frac{{26}}{{173}} Ta có: frac{{45}}{{100}} =...

>; <; = ?

So sánh hai phân số rồi điền dấu thích hợp.

a) $\frac{{24}}{{173}} < \frac{{26}}{{173}}$

Ta có: $\frac{{45}}{{100}} = \frac{{45:5}}{{100:5}} = \frac{9}{{20}}$, nên: $\frac{{45}}{{100}} = \frac{9}{{20}}$

Ta có: $\frac{{16}}{{21}} = \frac{{16 \times 3}}{{21 \times 3}} = \frac{{48}}{{63}}$, nên: $\frac{{43}}{{63}} < \frac{{16}}{{21}}$

b) Ta có: $\frac{{18}}{{19}} = \frac{{18 \times 2}}{{19 \times 2}} = \frac{{36}}{{38}}$, nên: $\frac{{18}}{{19}} < \frac{{37}}{{38}}$

Ta có: $\frac{2}{3} = \frac{{2 \times 16}}{{3 \times 16}} = \frac{{32}}{{48}}$, nên $\frac{{32}}{{48}} = \frac{2}{3}$

Ta có: $\frac{4}{5} = \frac{{4 \times 25}}{{5 \times 25}} = \frac{{100}}{{125}}$, nên: $\frac{{126}}{{125}} > \frac{4}{5}$

c) $\frac{{35}}{{39}} < 1$

Ta có: $\frac{{19}}{{19}} = 1$, nên $\frac{{19}}{{19}} > \frac{{35}}{{36}}$

Ta có: $\frac{{27}}{{29}} < 1;{\text{        }}\frac{{29}}{{27}} > 1$, nên $\frac{{27}}{{29}} < \frac{{29}}{{27}}$