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\(a,256+789:3-178\)
\(=256+263-178\)
\(=341\)
\(b,1485+\left(735-47\cdot8\right)\)
\(=1485+\left(735-376\right)\)
\(=1485+359\)
\(=1844\)
\(c,5635:5-8172:9\)
\(=1127-908\)
\(=219\)
![](https://rs.olm.vn/images/avt/0.png?1311)
125.a+125.7=1250 thì a=
125.a+875 =1250
125.a =1250-875
125.a =375
a =375:125
a =3
đây là bài mẫu còn 2 bài thì tự lực gánh sinh
125 x a +125 x 7 =125 x 10
a =10-7
a =3
256 x b +256 x 71 = 256 x 100
b =100-71
b =29
81 x c - 81 x 58 = 81 x 11
c =58 x 11
c =69
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a) 137 x 7 + 137 x 93
= 137 x ( 93 + 7 )
= 137 x 100 = 13700
b) 428 x 102 - 428 x 2
= 428 x ( 102 - 2 )
= 428 x 100
= 42800
c) 124 x 25 - 25 x 24
= 25 x ( 124 - 24 )
= 25 x 100
= 2500
_HỌC TỐT_
a) 137 x 7 + 137 x 93
\(=137\times\left(7+93\right)\\ =137\times100\\ =13700\)
b) 428 x 102 - 428 x 2
\(=428\times\left(102-2\right)\\
=428\times100\\
=42800\)
c) 124 x 25 - 25 x 24
\(=25\times\left(124-24\right)=\\ 25\times100=2500\)
#Châu's ngốc
Phep so sanh nao dung?
A. 123/124 > 124/125
B. 123/124=124/125
C. 123/124<124/125
D. 123/124 = 124-1/125
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Câu 8:
a: =2000235
b: =12km250600m2
c: =5000kg+200kg=5200kg
Câu 7 :
a | \(\dfrac{2}{5}\) | \(\dfrac{3}{4}\) | \(\dfrac{5}{4}\) | \(\dfrac{1}{4}\) |
b | \(\dfrac{1}{2}\) | \(\dfrac{5}{6}\) | \(\dfrac{7}{12}\) | \(\dfrac{4}{7}\) |
a \(+\) b | \(\dfrac{9}{10}\) | \(\dfrac{19}{12}\) | \(\dfrac{11}{6}\) | \(\dfrac{23}{28}\) |
a \(\times\) b | \(\dfrac{1}{5}\) | \(\dfrac{5}{8}\) | \(\dfrac{35}{48}\) | \(\dfrac{1}{7}\) |
Bài 8 :
a) \(2\) \(km^2\) \(235\) \(m^2\) \(= 2235\) \(m^2\)
b) \(12050600\) \(m^2 =\) \(12\) \(km^2\) \(50600 \) \(m^2\)
c) \(5\) tấn \(2\) tạ \(= 5200\) \(kg\)
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A = 8 x a + 8 x b + 8 x c
A = 8 x ( a + b + c )
Thay a + b + c = 150 vào biểu thức A = 8 x ( a + b + c) ta có
A = 8 x 150
A = 1200
Tìm x
a. x + 6734 = 3478 + 5782
b. 2054 + x = 4725 - 279
c. x - 3254 = 237 x 145
d. 124 - x = 44658 : 54
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\(a)\)\(x+6734=3478+5782\)
\(x+6734=9260\)
\(x=9260-6734\)
\(x=2526\)
\(b)\)\(2054+x=4725-279\)
\(2054+x=4446\)
\(x=4446-2054\)
\(x=2392\)
\(c)\)\(x-3254=237\times145\)
\(x-3254=34365\)
\(x=34365+3254\)
\(x=37619\)
\(d)\)\(124-x=44658\div54\)
\(124-x=827\)
\(x=124-827\)
\(x=-703\)
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a/=256x(82+18)
=256x100
=25600
b/211x(56+43+1)
=211x100=21100
8 x (256 - 124) = 8 x 132
= 1056
Kết quả bằng 1056