Câu hỏi của Nguyễn Hoài Chi (4A4)

Question

(3/20 + 1/2 - 1/15) × 12/49

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𝑷𝒉𝒖𝒐𝒏𝒈 𝑨𝒏𝒉 · Accepted Answer

$\left(\dfrac{3}{20}+\dfrac{1}{2}-\dfrac{1}{15}\right)\times\dfrac{12}{49}$

$=\left(\dfrac{3}{20}+\dfrac{10}{20}-\dfrac{1}{15}\right)\times\dfrac{12}{49}$

$=\left(\dfrac{13}{20}-\dfrac{1}{15}\right)\times\dfrac{12}{49}$

$=\left(\dfrac{39}{60}-\dfrac{4}{60}\right)\times\dfrac{12}{49}$

$=\dfrac{35}{60}\times\dfrac{12}{49}$

$=\dfrac{35\times12}{60\times49}$

$=\dfrac{1}{7}$

_HT_Câu trả lời: $\left(\dfrac{3}{20}+\dfrac{1}{2}-\dfrac{1}{15}\right)\times\dfrac{12}{49}$

$=\left(\dfrac{3}{20}+\dfrac{10}{20}-\dfrac{1}{15}\right)\times\dfrac{12}{49}$

$=\left(\dfrac{13}{20}-\dfrac{1}{15}\right)\times\dfrac{12}{49}$

$=\left(\dfrac{39}{60}-\dfrac{4}{60}\right)\times\dfrac{12}{49}$

$=\dfrac{35}{60}\times\dfrac{12}{49}$

$=\dfrac{35\times12}{60\times49}$

$=\dfrac{1}{7}$

_HT_

Đỗ Phương Linh · Answer

= (13/20-1/15)x12/49

=48/60x12/49

=576/2940Câu trả lời: = (13/20-1/15)x12/49

=48/60x12/49

=576/2940