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a: \(1968\cdot15+1968\cdot84+1968\)
\(=1968\left(15+84+1\right)\)
\(=1968\cdot100=196800\)
b: \(6412+5378+3582+4628\)
\(=\left(6412+4628\right)+\left(5378+3582\right)\)
\(=11040+8960=20000\)
c: \(178\cdot101-178\)
\(=178\cdot101-178\cdot1\)
\(=178\left(101-1\right)=178\cdot100=17800\)
d: \(153\cdot8+153+153\)
\(=153\left(8+1+1\right)\)
\(=153\cdot10=1530\)
a, (x-3418)+1968=1968+2582
x-3418 =1968+2582-1968
x-3418 =2582
x =2582+3418
x =6000
b,12346+(x+975)=3957+3975
12346+(x+975)=7932
x+975=12346-7932
x+975=4414
x =4414-975
x =3439
a) 8 x (x + 1968)=2010 x 8
8 x (x+ 1968)=16080
(x + 1968)=16080 : 8
(x + 1968)=2010
x = 2010 - 1968
x =42
b) ( x - 1992) x 4 = 4 x 2010
(x - 1992) x 4 = 8040
(x - 1992) = 8040 : 4
(x - 1992) = 2010
x = 2010 + 1992
x = 4002
MIK GIẢI HẾT RỒI ĐẤY!!
*HOC TỐT*!!
X x 23 + X x 35 - 1968 = 10270
X x ( 23 + 35 ) - 1968 = 10270
X x 58 - 1968 = 10270
X x 58 = 10270 + 1968
X x 58 = 12238
X = 12238 : 58
X = 211
X x 23 + X x 35 - 1968 = 10270
X x ( 23 + 35 ) - 1968 = 10270
X x 58 - 1968 = 10270
X x 58 = 10270 + 1968
X x 58 = 12238
X = 12238 : 58
X = 211
X * 23 + X * 35 - 1968 = 10270
X*(23+35)-1968=10270
X* 58 - 1968=10270
X*58 = 10270+1968
X* 58 = 12238
X = 12238:58
X =211
a) 1968 x 15 + 1968 x 84 + 1968
= 1968 x 15 + 1968 x 84 + 1968 x 1
= 1968 x (15 + 84 + 1)
= 1968 x 100 = 196800
b) 6412 + 5378 + 3582 + 4628
= (6412 + 5378) + (3582 + 4628)
= 11790 + 8210
= 20000
c) 178 x 101 - 178
= 178 x 101 - 178 x 1
= 178 x (101 - 1)
= 178 x 100
= 17800
d) 153 x 8 + 153 + 153
= 153 x 8 + 153 x 1 + 153 x 1
= 153 x (8 + 1 + 1)
= 153 x 10
= 1530