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Toán Lớp 7: a,3,5+|-1/2|-|-3,5|+1/2 b,|-10,5|-|-5,75|+|9 1/2|+|-5 3/4|

Home/ Toán Lớp 7: a,3,5+|-1/2|-|-3,5|+1/2 b,|-10,5|-|-5,75|+|9 1/2|+|-5 3/4|

Toán Lớp 7: a,3,5+|-1/2|-|-3,5|+1/2 b,|-10,5|-|-5,75|+|9 1/2|+|-5 3/4|

Hoa Tháng Chín 2, 2022 Toán học 1 Comment 0 views

Toán Lớp 7: a,3,5+|-1/2|-|-3,5|+1/2
b,|-10,5|-|-5,75|+|9 1/2|+|-5 3/4|

Comments ( 1 )

minhtamnguyet88
2 Tháng Chín, 2022 at 11:14 chiều

Reply

$\text{a/ 3,5 + |$-\dfrac{1}{2}$| – |-3,5| + $\dfrac{1}{2}$}$

$\text{= 3,5 + $\dfrac{1}{2}$ – 3,5 + $\dfrac{1}{2}$}$

$\text{= 0 + 1}$

$\text{= 1}$

$\text{Vậy 3,5 + |$-\dfrac{1}{2}$| – |-3,5| + $\dfrac{1}{2}$ = 1}$

$\text{b/ |-10,5| – |-5,75| + |$9\dfrac{1}{2}$| + |$-5\dfrac{3}{4}$|}$

$\text{= 10,5 – 5,75 + $9\dfrac{1}{2}$ + $5\dfrac{3}{4}$ }$

$\text{= $10\dfrac{1}{2}$ – $5\dfrac{1}{4}$ + $9\dfrac{1}{2}$ + $5\dfrac{3}{4}$}$

$\text{= ($10\dfrac{1}{2}$ + $9\dfrac{1}{2}$) + ($5\dfrac{3}{4}$ – $5\dfrac{1}{4}$)}$

$\text{= 20 + $\dfrac{1}{2}$ }$

$\text{= 20,5}$

$\text{Vậy |-10,5| – |-5,75| + |$9\dfrac{1}{2}$| + |$-5\dfrac{3}{4}$| = 20,5}$

$\text{Etude gửi bạn! UwU}$

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