3m < 32m

si

SI

1. It was noisy at the stadium.
2. Where were they yesterday?
3. My mother baked cupcakes.
4. Tom kicks the ball hard.

I was at the stadium. It was noisy

Where were they yesterday?

My mother baked cupcake

Tom kicks the hard ball

10 : 3 = 3 (dư 1)

10 : 3 = 3 dư 1

Hoặc:

10 : 3 = \(\frac{10}{3}\)

to

To nha

a; \(\frac{21}{23}\) : \(\frac{19}{14}\) + \(\frac{12}{23}\) : \(\frac{19}{5}\)

= \(\frac{21}{23}\) x \(\frac{14}{19}\) + \(\frac{12}{23}\) x \(\frac{5}{19}\)

= \(\frac{21\times14+12\times5}{23\times19}\)

= \(\frac{294+60}{437}\)

= \(\frac{354}{437}\)

 \(\frac{21}{23}\) : \(\frac{19}{14}\) + \(\frac{12}{23}\) : \(\frac{19}{5}\)

= \(\frac{21}{23}\) x \(\frac{14}{19}\) + \(\frac{12}{23}\) x \(\frac{5}{19}\)

= \(\frac{21 \times 14 + 12 \times 5}{23 \times 19}\)

= \(\frac{294 + 60}{437}\)

= \(\frac{354}{437}\)

to

To

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The liquid obtained from the rubber tree is called rubber latex.

Giải:

Cứ mỗi phút Hiếu chạy được là:

60 : 30 = 2(m)

Hiếu chạy 240m cần thời gian là:

240 : 2 = 120 (phút)

120 phút = 2 giờ

Đáp số: 2 giờ

Nếu Hiếu chạy 240m thì hết 2 tiếng.

2 x 0,9 = 1,8

2⋅0,9=1,8