tính nhanh
(-2)3.(-8)+24
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\(2\times169\times12-3\times68\times8-24\)
\(=24\times169-24\times68-24\)
\(=24\times\left(169-68-1\right)\)
\(=24\times100=2400\)
3 - [ \(\dfrac{2}{4}\) \(\times\) \(\dfrac{1}{2}\) + \(\dfrac{2}{4}\) \(\times\) \(\dfrac{3}{2}\) + \(\dfrac{24}{8}\) \(\times\)\(\dfrac{2}{4}\) + \(\dfrac{2}{4}\)]
= 3 - \(\dfrac{2}{4}\) \(\times\) ( \(\dfrac{1}{2}\) + \(\dfrac{3}{2}\) + 3 + 1)
= 3 - \(\dfrac{2}{4}\) \(\times\) ( 2 + 3 + 1)
= 3 - \(\dfrac{1}{2}\) \(\times\) 6
= 3 - 3
= 0
=1/4 x 1/4 + 1/4 x 1/4 ( rút gọn)
= 1/16 + 1/16
= 2/16
k mk nha . cảm ơn bạn nhìu
a. 53 + 8 x 53 +53
=53 + 424 + 53
=477 + 53= 530
#)Trả lời :
a) 24 x 2 x 2 + 2 x 12
= 48 x 2 + 24
= 96 + 24
= 120
b) 8 + 8 x 3 + 16 : 2 x 6
= 8 + 24 + 48
= 32 + 48
= 80
#~Will~be~Pens~#
tính nhanh cơ mà bạn
sao bạn lại tính như kiểu tính giá trị biểu thức thế?
\(\dfrac{8}{7}:\dfrac{3}{14}x\dfrac{4}{3}:\dfrac{7}{8}-\dfrac{24}{7}=\left(\dfrac{24}{7}-\dfrac{8}{7}\right)\)
mik chỉ bít thế thui
\(3-\left(\frac{43}{8}+x-\frac{173}{24}\right):\frac{50}{3}=2\)
\(3-\left(\frac{43}{8}+x-\frac{173}{24}\right)=2×\frac{50}{3}\)
\(3-\left(\frac{43}{8}+x-\frac{173}{24}\right)=\frac{100}{3}\)
\(\left(\frac{43}{8}+x-\frac{173}{24}\right)=3-\frac{100}{3}\)
\(\left(\frac{43}{8}+x-\frac{173}{24}\right)=-\frac{91}{3}\)
\(\frac{43}{8}+x=-\frac{91}{3}+\frac{173}{24}\)
\(\frac{43}{8}+x=-\frac{185}{8}\)
\(x=-\frac{185}{8}-\frac{43}{8}\)
\(x=-\frac{57}{2}\)
vậy \(x=-\frac{57}{2}\)
nhầm
\(3-\left(\frac{43}{8}+x-\frac{173}{24}\right):\frac{50}{3}=2\)
\(\left(\frac{43}{8}+x-\frac{173}{24}\right):\frac{50}{3}=3-2\)
\(\left(\frac{43}{8}+x-\frac{173}{24}\right):\frac{50}{3}=1\)
\(\left(\frac{43}{8}+x-\frac{173}{24}\right)=1×\frac{50}{3}\)
\(\left(\frac{43}{8}+x-\frac{173}{24}\right)=\frac{50}{3}\)
\(\frac{43}{8}+x=\frac{50}{3}+\frac{173}{24}\)
\(\frac{43}{8}+x=\frac{191}{8}\)
\(x=\frac{191}{8}-\frac{43}{8}\)
\(x=\frac{37}{2}\)
vậy \(x=\frac{37}{2}\)
(-2)3. (- 8) + 24
= (-8) . (-8) + 16
= 64 + 16
= 80
\(\left(-2\right)^3.\left(-8\right)+2^4\)
\(\Rightarrow\left(-8\right).\left(-8\right)+16\)
\(\Rightarrow64+16\)
\(\Rightarrow80\)