694 x (16856 : 172 + 47 )=
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\(37\times46+37\times51+111\)
\(=37\times46+37\times51+37\times3\)
\(=37\times\left(46+51+3\right)\)
\(=37\times100\)
\(=3700\)
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\(172\times47+86\times8-34\times4\)
\(=172\times47+172\times4-34\times4\)
\(=172\times\left(47+4\right)-34\times4\)
\(=172\times51-34\times4\)
\(=172\times3\times17-17\times2\times4\)
\(=17\times\left(172\times3-2\times4\right)\)
\(=17\times\left(516-8\right)\)
\(=17\times508\)
\(=8636\)
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\(35\times215-35\times200-175\)
\(=35\times215-35\times200-35\times5\)
\(=35\times\left(215-200-5\right)\)
\(=35\times10\)
\(=350\)
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\(48\times56+28\times104\)
\(=48\times2\times28+28\times104\)
\(=28\times\left(48\times2+104\right)\)
\(=28\times200\)
\(=5600\)
![](https://rs.olm.vn/images/avt/0.png?1311)
a) \(37\times46+37\times51+111\)
\(=37\times46+37\times51+37\times3\)
\(=37\times\left(46+51+3\right)\)
\(=37\times100\)
\(=3700\)
b) \(35\times215-35\times210-175\)
\(=35\times215-35\times210-35\times5\)
\(=35\times\left(215-210-5\right)\)
\(=35\times0\)
\(=0\)
c) \(172\times47+86\times8-34\times4\)
\(=4\times\left(43\times47+86\times2-34\right)\)
\(=4\times\left(2021+172-34\right)\)
\(=4\times2159\)
\(=8636\)
d) \(48\times56+28\times104\)
\(=48\times56+56\times52\)
\(=56\times\left(48+52\right)\)
\(=56\times100\)
\(=5600\)
![](https://rs.olm.vn/images/avt/0.png?1311)
![](https://rs.olm.vn/images/avt/0.png?1311)
![](https://rs.olm.vn/images/avt/0.png?1311)
a)501.(x-694)=164829
x-694 =164829:501
x-694 =329
x =329+694
x =1023
Vậy x=1023
b)(x.81+2.81-3530).21=714
x.81+2.81-3530 =714:21
x.81+2.81-3530 =34
81.(x+2) =34+3530
81.(x+2) =3564
x+2 =3564:81
x+2 =44
x =44-2
x =42
Vậy x=42
![](https://rs.olm.vn/images/avt/0.png?1311)
Hướng dẫn giải:
+ 1273 + 536 : 4 = 1273 + 134 = 1407
+ Với m = 2, giá trị biểu thức (12 694 + 9125) x m là:
(12694 + 9125) x m = (12694 + 9125) x 2 = 21819 x 2 = 43638
![](https://rs.olm.vn/images/avt/0.png?1311)
a) 501 * ( X -694)= 164829
(X-694) = 164829 : 501
(X-694)=329
X = 329+694
X = 1023
694 x 145 = 100630
100630