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a) 36 x 532 + 63 x 532 + 532
= 532 x (36 + 63 + 1)
= 532 x 100
= 53200
b) 679 + 679 x 123 - 679 x 24
= 679 x (1 + 123 - 124)
= 679 x 0
= 0
c) 245 x 327 - 245 x 18 - 9 x 245
= 245 x (327 - 18 - 9)
= 245 x 300
= 73500
a)
\(36\times532+63\times532+532\)
\(=36\times532+63\times532+532\times1\)
\(=532\times\left(36+63+1\right)\)
\(=532\times100\)
\(=53200\)
b)
\(679+679\times123-679\times24\)
\(=679\times1+679\times123-679\times24\)
\(=679\times\left(1+123-24\right)\)
\(=679\times100\)
\(=67900\)
c)
\(245\times327-245\times18-9\times245\)
\(=245\times\left(327-18-9\right)\)
\(=245\times300\)
\(=73500\)
[1 x 2 x 3 x 4 x........................x100] x [679+679 x 123-679 x124]
= A x [679 x 124-679 x 124]
= A x 0
=0
X x 3=123
x = 123 :3
x = 41
Suy ra x =41
300 : x =60
x = 300:60
x = 5
Suy ra x =5
12 + 34 + 56 + 78 + 123 + 99 + 322 + 199 = 1223
12 x 45 x 67 x 89 x 0 = 0
12 : 4 : 3 x 9 : 3 x 1259 = 3777
Tk nha
(1256 + 859 + 5864 - 2568) x (3 x 672 -7 x 288)
=5411x(2016-2016)
=5411x0
X x 99 + X = 300
\(\Rightarrow\)X x 100 = 300
\(\Rightarrow\)X = 3
X x 123 - 245 = 7012
\(\Rightarrow\)X x 123 = 7257
\(\Rightarrow\)X = 7257 : 123
\(\Rightarrow\)X = 59
X x 124 - 2568 = 5988
\(\Rightarrow\)X x 124 = 8556
\(\Rightarrow\)X = 8556 : 124
\(\Rightarrow\)X = 69
X x 99 + X = 300
X x ( 99 + 1 ) = 300
X x 100 = 300
X = 300 : 100
X = 3
X x 123 - 245 = 7012
X x 123 = 7012 + 245
X x 123 = 7257
X = 7257 : 123
X = 59
X x 124 - 2568 = 5988
X x 124 = 5988 + 2568
X x 124 = 8556
X = 8556 : 124
X = 69
X x 99 + X =300
Xx(99+1)=300
X x 100 = 300
X =3
X x 123 - 245 =7012
X x 123 =7257
X =59
X x 124 - 2568 = 5988
X x 124 =8556
X x =8556 :124
X =69
X x 99 + X = 300
=> X x (99 + 1) = 300
=> X x 100 = 300
=> X = 3
X x 123 - 245 = 7012
=> X x 123 = 7257
=> X = 7257 : 123
=> X = 59
X x 124 - 2568 = 5988
=> X x 124 = 8556
=> X = 8556 : 124
=> X = 69
X × 99 + X = 300
X × ( 99 + 1 ) = 300
X × 100 = 300
X = 300 : 100
X = 3
Vậy X = 3
X × 123 - 245 = 7012
X × 123 = 7012 + 245
X × 123 = 7257
X = 7257 : 123
X = 59
Vậy X = 59
X × 124 - 2568 = 5988
X × 124 = 5988 + 2568
X × 124 = 8556
X = 8556 : 124
X = 69
Vậy X = 69
X x 99 + x = 300 X x 123 - 245 = 7012 X x 124 - 2568 = 5988
X x ( 99 + 1 ) = 300 X x 123 = 7012 + 245 X x 124 = 5988 + 2568
X x 100 = 300 X x 123 = 7257 X x 124 = 8556
X = 300 : 100 X = 7257 : 123 X = 8556 : 124
X = 3 X = 59 X = 69
X x 99 + X = 300
X x 99 + X x1=300
X x(99+1)=300
X x 100=300
X =300:100
X =3
X x 123 - 245 = 7012
X x 123 =7012+245
X x 123 =7257
X =7257:123
X =59
X x 124 - 2568=5988
X x 124 = 5988+2568
X x 124 =8556
X = 8556 : 124
X =69