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10 x 25 x 100 x 4
= 10 x ( 25 x 4 ) x 100
= 10 x 100 x 100
= 1000 x 100 = 100000
# Học tốt #
10x25x100x4
= 10 x100 x(25x4)
=1000 x 100 =
= 100000
Học giỏi nhé.
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25 x 9 x 4 - 50 x 2 x 6 + 100
= 100 x 9 - 100 x 6 + 100
= 100 x ( 9 - 6 + 1 )
= 100 x 4 = 400
25 x 9 x 4 - 50 x 2 x 6 + 100
= ( 25 x 4 ) x 9 - ( 50 x 2 ) x 6 + 100
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a) \(11\times\left(x-6\right)=x\times4+11\)
\(11\times x-66=x\times4+11\)
\(\Rightarrow11\times x-x\times4=11+66\)
\(x\times\left(11-4\right)=77\)
\(x\times7=77\)
\(x=77:7\)
\(x=11\)
b) \(12:x+4=3+25:5\)
\(12:x+4=3+5\)
\(12:x+4=8\)
\(12:x=8-4\)
\(12:x=4\)
\(x=12:4\)
\(x=3\)
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a, 2/3 - 2/9 + 7/9 = 6/9 - 2/9 + 7/9 = 10/9
b, 7/6 + 3/5 : 6 = 7/6 + 3/5 x 1/6 = 7/6 + 1/10 = 70/60 + 6/10 = 76/10 = 38/5
c, x : 6/25 = 18
x = 18 x 6/25
x = 36/25
d, ( 2/5 + 4/7) : x = 17/5
29/35 : x = 17/5
x = 29/35 : 17/5
x = 29/119
\(a.\dfrac{2}{3}-\dfrac{2}{9}+\dfrac{7}{9}=\dfrac{6}{9}-\dfrac{2}{9}+\dfrac{7}{9}=\dfrac{4}{9}+\dfrac{7}{9}=\dfrac{11}{9}\\ b.\dfrac{7}{6}+\dfrac{3}{5}:6=\dfrac{7}{6}+\dfrac{3}{5}\times\dfrac{1}{6}=\dfrac{7}{6}+\dfrac{1}{10}=\dfrac{70}{60}+\dfrac{6}{60}=\dfrac{76}{60}=\dfrac{19}{15}\\ c.x:\dfrac{6}{25}=18\\ x=18\times\dfrac{6}{25}\\ x=\dfrac{108}{25}\\ d.\left(\dfrac{2}{5}+\dfrac{4}{7}\right):x=\dfrac{17}{5}\\ \dfrac{34}{35}:x=\dfrac{7}{5}\\ x=\dfrac{34}{35}:\dfrac{7}{5}\\ x=\dfrac{34}{49}\)
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2 x 3 x 4 x 5 x 25
= (25 x 4 ) x ( 2 x 5 ) x 3
= 100 x 10 x 3
=1000 x 3
=3000
Hk tốt
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=9950
= 9950 nhé !