27 x 54 + 46 x 27 + 73 x 65 + 35 x 73
tính nhanh:
45+27+65+46+35+73+54+18+27
Đề:45+27+65+46+35+73+54+18+27
=(27+73)+(65+35)+(54+46)+(45+27+18)
=100+100+100+90
=390
3,54 x 73 + 0,23 x 46 + 3,54 x 27 + 0,77 x 46
= ( 3,54 x 73 + 3,54 x 27) + ( 0,23 x 46+ 0,77 x 46)
= 3,54 x ( 73 + 27 ) + 46x ( 0,23 + 0,77)
= 3,54 x 100 + 46 x 1
= 354 + 46
= 400
3.527 + 65 x 73 + 65 x 27 + 3.573
3,527 + 65 x 73 + 65 x 27 + 3,573
= 3,527 + 65 x ( 73 + 27 ) + 3,573
= 3,527 + 65 x 100 + 3,573
= 3,527 + 6500 + 3,573
= 6507,1
\(3,527+65\times73+65\times27+3,573\\ =\left(3,527+3,573\right)+65\times\left(73+27\right)\\ =7,1+65\times100\\ =7,1+6500\\ =6507,1\)
A =3,527 + 65 \(\times\) 73 + 65 \(\times\) 27 + 3,573
A = (3,527 + 3,573) + (65 \(\times\) 73 + 65 \(\times\) 27)
A = 7,1 + 65 \(\times\) ( 73 + 27)
A = 7,1 + 65 \(\times\) 100
A = 7,1 + 6500
A = 6507,1
Tìm x
17 + 46 - x = 27
25 + x = 73 - 19
17 + 46 - \(x\) = 27
63 - \(x\) =27
\(x\) = 63 - 27
\(x\) = 36
25 + \(x\) = 73 - 19
25 + \(x\) = 54
\(x\) = 54 - 25
\(x\) = 29
số 1 : tính nhanh
A = 78 x 31 + 78 x 24 + 78 x 17 + 22 x 72
C = 53 x 39 + 47 x 39 - 53 x 21 - 47 x 21
B = 35 x 34 + 35 x 86 + 65 x 75 + 65 x 45
D = 27 x 332 + 68 x 27 + 73 x 332 + 68 x 73
E = 2 x 53 x 12 + 4 x 6 x 37 + 2 x 38 x 12
F = 3 x25 x 8 + 4 x 6 x 37 + 2 x 38 x 12
A = 78 x 31 + 78 x 24 + 78 x 17 + 22 x 72
A = 78 x ( 31 + 24 + 17 ) + 22 x 72
A = 78 x 72 + 22 x 72
A = 72 x ( 78 + 22 )
A = 72 x 100
A = 7200
C = 53 x 39 + 47 x 39 - 53 x 21 - 47 x 21
C = 39 x ( 53 + 47 ) - 21 x ( 53 - 47 )
C = 39 x 100 - 21 x 6
C = 3900 - 126
C = 3774
A = 78 x 31 + 78 x 24 + 78 x 17 + 22 x 72
A = 78 x ( 31 + 24 +17 ) + 22 x 72
A = 78 x 72 + 22 x 72
A = 72 x ( 78 + 22 )
A = 72 x 100
A = 7200
a,27 x 121 - 87 x 27 + 73 x 34
b, 125 x 98 - 125 x 46 - 52 x 25
35 x 73 + 35 x 27
Kết quả là:
35 x (27 + 73) = 3500
Đáp số: 3500
35 x 73 +35 x 27
= ( 73 +27 ) x 35
= 100 x 35
= 3500
k minh nha Nguyễn Hữu Triết
(154+46)x(73+27)=?
\(\left(154+46\right)\times\left(73+27\right)\)
\(=200\times100\)
\(=20000\)
nha
\(\left(154+46\right)\times\left(73+27\right)\)
\(=200\times100\)
\(=20000\)
3, 54 x 73 + 0,23 x 25 + 3,54 x 27 + 0,17 x 25 = ?
3, 54 x 73 + 0,23 x 25 + 3,54 x 27 + 0,17 x 25
= 3,54 x 73 + 3,54 x 27 + 0,23 x 25 + 0,17 x 25
= 3,54 x(73+27) + 25 x (0,23+0,17)
= 3,54 x 100 + 25 x 0,4
= 3,54 x 100 + 10
= 35,4 x 10 + 10
= 10 x (35,4+1)
= 10 x 36,4
= 364