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x : 98 = 75 dư 39
nên (x-39) : 98 = 75
(x-39) = 75 x 98
x - 39 = 7350
x = 7350 + 39
x = 7389
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\(\frac{98\cdot17-66\cdot17}{72}\)
\(=\frac{(98-66)\cdot17}{72}\)
\(=\frac{32\cdot17}{72}=\frac{2\cdot16\cdot17}{2\cdot36}=\frac{2\cdot2\cdot2\cdot2\cdot2\cdot17}{2\cdot2\cdot2\cdot3\cdot3}=\frac{2\cdot2\cdot17}{3\cdot3}=\frac{4\cdot17}{3\cdot3}=\frac{68}{9}\)
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(98x17—17x26):72
=17x(98—26):72
=17x72:72
=17x1
=17
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A,(36×28+36×28)÷73
=36x(28+28):73
=36x56:73
=2016:73
=2016/73
B,(98×17-26×17)÷72
=17x(98-26):72
=17x72:72
=17x(72:72)
=17x1
=17
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Sao ma de vay troi ! Ne :
98 * 75 + 75 + 75= 98 * 75 + 75 *1 + 75 * 1= 75 *( 1+1+98)= 75 * 100 = 7500
Vay thui !
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95/75 = 19/15
8/128 = 1/16
840/21 = 40
92/7 (phân số tối giản)
Chúc bạn học tốt.
😁😁😁
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a)
75 X(x+157)=24450
x+157 =24450:157
x+157 =326
x =326-7
x =319
b)41846: (x-384)=98
x-384 =41846:98
x-384 =427
x =427+384
x =811
x-384 =
a) 75 x ( X + 157 ) = 24450
X + 157 = 24450 : 75
X + 157 = 326
X = 326 - 157
X = 169
Vậy X = 169
b) 41846 : ( X - 384 ) = 98
X - 384 = 41846 : 98
X - 384 = 427
X = 427 + 384
X = 811
Vậy X = 811
4135 :17=243(R=4)
20682 : 98=211(R=4)
38200:870=43(R=79)
128567 :128=1004(R=5)
36820:75=490(R=70)
\(\dfrac{4135}{7}\)
\(\dfrac{10341}{49}\)
\(\dfrac{3820}{87}\)
1004.429688
\(\dfrac{7364}{15}\)