9 734 - 2 . x = 168
370 x 734 + 123 x 266 - 147 x 734
370 x 734 + 123 x 266 - 147 x 734
= 734 x (370 - 147) + 123 x 266
= 734 x 223 + 123 x 266
= 123 x (734 + 266) + 734 x 100
= 123 x 1000 + 734 x 100
= 123000 + 73400
= 196400
Tìm x biết - 5 8 - x : 3 5 6 + 7 3 4 = - 2
A. x = 219 92
B. x = - 1679 48
C. x = 92 219
D. x = 1679 48
32.x+85:17=734
Tìm X
32x + 5 = 734
9x = 734 - 5 = 729
x = 729 : 9
x = 81
Đặt tính rồi tính:
a/ 536 + 248 b/ 938 – 385
c/ 306 x 2 d/ 734 : 5
a/ = 784; b/ = 553;
c/ = 612; d/ = 146 dư 4
a) 2^x+124=5^x b)10^x+168=y^2 c)35^x +9=2.5^y
x nhân 3,57 - 2,43 = 27
2,43 nhân x + 3,57 nhân x = 27
x + x nhân 5/2 + x chia 2/9 = 168
9 + x/13 -x = 5/6
/ là phần nha
Tính hợp lí ( nếu có ) :
a) 1152 - ( 374 + 1152 ) + ( - 65 + 734 )
b) 13 - 12 + 11 + 10 - 9 + 8 - 7 - 6 + 5 - 4 + 3 + 2 = 1
tính bằng cách thuận tiện
7794 –( 873– 734 )+(1873– 794 – 734 )
7794 - ( 873 - 734 ) + ( 1873 - 794 - 734 )
= 7794 - 873 + 734 + 1873 - 794 - 734
= ( 7794 - 794 ) + [ (-873) + 1873 ] + (734 - 734 )
= 7000 + 1000 + 0
= 8000.
Tính bằng hai cách @ ( 524 - 168):4 B 72:(9 x 4) C (25 x 72) :9
\(a,C1:\left(524-168\right):4=356:4=89\\ C2:\left(524-168\right):4=524:4-168:4=131-42=89\)
\(b,C1:72:\left(9\times4\right)=72:36=2\\C2:72:\left(9\times4\right)=\left(72:9\right):4 =8:4=2\)
\(c,C1:\left(25\times72\right):9=1800:9=200\\ C2:\left(25\times72\right):9=25\times\left(72:9\right)=25\times8=200\)
a,C1:(524−168):4=356:4=89C2:(524−168):4=524:4−168:4=131−42=89a,C1:(524−168):4=356:4=89C2:(524−168):4=524:4−168:4=131−42=89
b,C1:72:(9×4)=72:36=2C2:72:(9×4)=(72:9):4=8:4=2b,C1:72:(9×4)=72:36=2C2:72:(9×4)=(72:9):4=8:4=2
c,C1:(25×72):9=1800:9=200C2:(25×72):9=25×(72:9)=25×8=200