x + 54 = 354
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( 4 + x ) + ( 9 + x ) + ( 14 + x ) +...+ ( 54 + x ) =354
4+x+9+x+14+x+...+54+x=354
(4+9+14+...+54)+ 11x =354
319 + 11x =354
11x=35
x=35/11
( 4 + x ) + ( 9 + x) + ( 14 + x) + ... + ( 54 + x) = 354
(4+96)+(9+49)+(14+136)+(54+0)
a) 135 - 35 : 5 = 100 : 5 = 20
b) 246 + 54 x 2 = 246 + 108 = 354
c) 135 - 35 : 5 = 135 - 7= 128
d) 246 + 54 x 2 = 300 x 2= 600
136 x 46 + 68 x 2 x 54
= 136 x 46 + 136 x 54
= 136 x (46 + 54)
= 136 x 100
= 13600
218 x 63 - 59 x 2 x 63
= 218 x 63 - 118 x 63
= 63 x (218 - 118)
= 63 x 100
= 6300
354 x 452 + 704 x 274
= 160008 + 192896
= 352904
668 x 182 - 334 x 164
= 334 x 2 x 182 - 334 x 164
= 334 x 364 - 334 x 164
= 334 x (364 - 164)
= 334 x 200
= 66800
#Học tốt!!!
136x46+68x2x54
=6256+7344
=13600
218x63-59x2x63
=13734-7434
=6300
354 x 452 + 704 x 274
=160008+192896
=352904
668 x 182 - 334 x164
=121576-54776
=66800
\(\begin{array}{*{20}{c}}{a)\,\,}\\{}\\{}\end{array}\begin{array}{*{20}{c}}{ + \begin{array}{*{20}{c}}{435}\\{352}\end{array}}\\\hline{\,\,\,787}\end{array}\) \(\begin{array}{*{20}{c}}{ + \begin{array}{*{20}{c}}{236}\\{528}\end{array}}\\\hline{\,\,\,\,764}\end{array}\) \(\begin{array}{*{20}{c}}{ + \begin{array}{*{20}{c}}{354}\\{\,\,\,63}\end{array}}\\\hline{\,\,\,\,417}\end{array}\)
\(\begin{array}{*{20}{c}}{b)\,\,}\\{}\\{}\end{array}\begin{array}{*{20}{c}}{ - \begin{array}{*{20}{c}}{569}\\{426}\end{array}}\\\hline{\,\,\,\,143}\end{array}\) \(\begin{array}{*{20}{c}}{ - \begin{array}{*{20}{c}}{753}\\{236}\end{array}}\\\hline{\,\,\,517}\end{array}\) \(\begin{array}{*{20}{c}}{ - \begin{array}{*{20}{c}}{880}\\{\,\,54}\end{array}}\\\hline{\,\,\,826}\end{array}\)
Trong các số 54; 610; 7363; 33 354; 2196; 50 601; 431 161 các số không chia hết cho 3 là: 610; 7363; 431 191.
= 345 x 354 + 354 x 234 + 354 x 675 + 354 x 1
= 354 x ( 345 + 234 + 675 + 1 )
= 354 x 1255
= 444270
\(\left(124-x\right)\times354=354\times28\)
\(\left(124-x\right)=354\times28\div354\)
\(124-x=28\)
\(x=124-28\)
\(x=96\)
1: =354(4+5+1)-350
=3540-350
=3190
2:
a: 19040:x=340
=>x=19040/340=56
b: x-3678=2541*4
=>x-3678=10164
=>x=10164+3678=13842
c: x*282-270*x=1512
=>12x=1512
=>x=126
d: =>(177-96+21):x=6
=>102:x=6
=>x=102/6=17