Câu hỏi của trần vân hà

Question

tính:

(3$\dfrac{1}{3}$: 3,2 +4,5 . 1$\dfrac{31}{45}$):(-21$\dfrac{1}{2}$)

thám tử · Accepted Answer

$\left(3\dfrac{1}{3}:3,2+4,5.1\dfrac{31}{45}\right):\left(-21\dfrac{1}{2}\right)$

$=\left(\dfrac{10}{3}:\dfrac{16}{5}+\dfrac{9}{2}.\dfrac{76}{45}\right):\left(\dfrac{-43}{2}\right)$

$=\left(\dfrac{25}{24}+\dfrac{38}{5}\right):\left(\dfrac{-43}{2}\right)$

$=\dfrac{1037}{120}:\left(\dfrac{-43}{2}\right)$

$=\dfrac{-1037}{2580}$Câu trả lời: $\left(3\dfrac{1}{3}:3,2+4,5.1\dfrac{31}{45}\right):\left(-21\dfrac{1}{2}\right)$

$=\left(\dfrac{10}{3}:\dfrac{16}{5}+\dfrac{9}{2}.\dfrac{76}{45}\right):\left(\dfrac{-43}{2}\right)$

$=\left(\dfrac{25}{24}+\dfrac{38}{5}\right):\left(\dfrac{-43}{2}\right)$

$=\dfrac{1037}{120}:\left(\dfrac{-43}{2}\right)$

$=\dfrac{-1037}{2580}$

Nguyễn Phương Anh · Answer

($3\dfrac{1}{3}:3,2+4,5.1\dfrac{31}{45}$):($-21\dfrac{1}{2}$)

=($\dfrac{10}{3}:3,2+4,5.\dfrac{76}{45}$):($-\dfrac{43}{2}$)

=($\dfrac{25}{24}+\dfrac{38}{5}$):($-\dfrac{43}{2}$)

=$\dfrac{-1037}{2580}$Câu trả lời: ($3\dfrac{1}{3}:3,2+4,5.1\dfrac{31}{45}$):($-21\dfrac{1}{2}$)

=($\dfrac{10}{3}:3,2+4,5.\dfrac{76}{45}$):($-\dfrac{43}{2}$)

=($\dfrac{25}{24}+\dfrac{38}{5}$):($-\dfrac{43}{2}$)

=$\dfrac{-1037}{2580}$

Bài 4: Giá trị tuyệt đối của một số hữu tỉ. Cộng, trừ, nhân, chia số thập phân