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\(=123\times\left(6+3+1\right)\)
\(=123\times10\)
\(=1230\)
\(123\times137-123\times36-123=123\times\left(137-36-1\right)=123\times100=12300\)
123 × 97 + 2 × 123 + 123 = 123 x ( 97 + 2 + 1) = 123 x 100 = 12300
123 x 97 + 2 x 123 + 123
= 123 x 97 + 2 x 123 + 123 x 1
= 123 x ( 97 + 2 +1 )
= 123 x 100
= 12300.
N H Ớ T I C K C H O M Ì N H N H A
~ HT~
123×45+123×55
=123×(45+55)
=123×100
=12300
56×4+56×3+56×2+56
=56×4+56×3+56×2+56×1
=56×(4+3+2+1)
=56×10
=560
[ 123×154-65×123]:89
=[123×(154-65)]:89
= 123×89:89
=123×(89:89)
=123×1
=123
123 x 45 + 123 x 55
= 123 x ( 45 + 55 )
= 123 x 100
= 12300
56 x 4 + 56 x 3 + 56 x 2 + 56
= 56 x ( 4 + 3 + 2 + 1 )
= 56 x 10
= 560
[ 123 x 154 - 65 x 123 ] : 89
= [ 123 x ( 154 - 65 ) ] : 89
= [ 123 x 89 ] : 89
= 123
Học tốt #
bạn ơi bạn ko cần phải ghi là nhân đâu bạn ấn dấu x là được nhé
bạn nhắn lại đi ko thì mình ko hiểu đâu nhé
Hướng dẫn giải:
a) 71 x 5 x 4 = 71 x (5 x 4) = 71 x 20 = 1420
b) 123 x 50 x 2 = 123 x (50 x 2) = 123 x 100 = 12300
c) 4 x 138 x 25 = (4 x 25) x 138 = 100 x 138 = 13800
d) 25 x 96 x 4 = (25 x 4) x 96 = 100 x 96 = 9600
e) 5 x 81 x 2 = (5 x 2) x 81 = 10 x 81 = 810
g) 50 x 104 x 2 = (50 x 2) x 104 = 100 x 104 = 10400
458 - 123 x 13 + 45
= 458 - 1599 + 45
= (-1141) + 45
= - 1096
\(a,123\times54+27\times123-12\times123+123\times31\)
\(=123\times\left(54+27-12+31\right)\)
\(=123\times100\)
\(=12300\)
\(b,\dfrac{121}{27}\times\dfrac{54}{11}< n< \dfrac{100}{21}:\dfrac{25}{126}\)
\(22< n< \dfrac{100}{21}\times\dfrac{126}{25}\)
\(22< n< 24\)
Vì \(23>22\) và \(23< 24\) nên \(n=23\)
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có bao nhiêu chữ g
TL
A
HT