Tính nhanh:
35 . 34+35 . 38+65 . 75+65 . 45
36 . 28+36 . 82+64 . 69+64 . 41
123 . 456+456 . 321 -256 . 444
Các bạn giúp mik ha!@
Tính Nhanh:36*28+36*82+64*69+64*41
\(36.28+36.82+64.69+64.41\)
\(=36.\left(28+82\right)+64.\left(69+41\right)\)
\(=36.110+64.110\)
\(=110.\left(36+64\right)\)
\(=110.100\)
\(=11000\)
36 x 28 + 36 x 82 + 64 x 69 + 64 x 41 = ?
=36x(28+82)+64x(69+41)
=36x110+64x110
=110x(26+64)
=110x100
=11000
**** bn hiền
36x28+36x82+64x69+64x41
=36x(28+82)+64x(69+41)
=36x110+64x110
=110x(36+64)
=110x100
=11000
36 x ( 28 + 82 ) + 64 x ( 69 + 41 ) = ( 36 + 64 ) x (28 + 82) = 100 x 110 = 11000
tinh nhanh
36*28+36*82+64*69+64*41
chia làm 2 phần:
36x28+36x82
+
64x69+69x41
=
36 x (28+82)
+
69 x (64+41)
=
36 x 110
+
69 x 105
=
(36 x 100) + (36 x 10)
+
(69 x 100) + (69 x 5)
=
3600 + 360
+
6900 + 345
=
3960
+
7245
đáp số:
11205
\(36.28+36.82+64.69+64.41\)
\(=36\left(28+82\right)+64\left(69+41\right)\)
\(=36.110+64.110\)
\(=110\left(36+64\right)\)
\(=110.100=11000\)
a, 35. 34+ 35. 36+ 66. 75+ 66. 45
b, 3. 25. 8+ 4. 37. 6+ 2. 38. 12
c, 36. 28+ 36. 82+ 64. 69+ 64. 41
d, 39. 8+ 60. 2+21.8
36 * 28 + 36 * 82 + 64 * 69 + 64 * 41=?
nhớ ghi các bước tính và cách giải rõ ràng
36 * 28 + 36 * 82 + 64 * 69 + 64 * 41
= 36 * ( 28 + 82 ) + 64 * ( 69 + 41 )
= 36 * 110 + 64 * 110
= 110 * ( 36 + 64 )
= 110 * 100
= 11000
Tinh bang cách hợp lý nhất
A,39×8+60×2+21×8 b,12×53+53×172-53×84
C,35×34+35×86+65×75+65×67+65×45
D,36×28+36×82+64×69+64×41
a, 39 . 8 + 60 . 2 + 21 . 8
= 39 . 8 + 15 . 4 . 2 + 21 . 8
= 39 . 8 + 15 . 8 + 21 . 8
= 8 . ( 39 + 15 + 21 )
= 8 . 75
= 600
b, 12 . 53 + 53 . 172 - 53 . 84
= 53 . ( 12 + 172 - 84 )
= 53 . 100
= 5300
c, 35 . 34 + 35 . 86 + 65 . 75 + 65. 67 + 65.45
= 35 . ( 34 + 86 ) + 65 . ( 75 + 67 + 45 )
= 35 . 120 + 65 . 187
= 4200 + 12155
= 16355
d, 36 . 28 + 36 . 82 + 64 . 69 + 64 . 41
= 36 . ( 28 + 82 ) + 64 . ( 69 + 41 )
= 36 . 110 + 64 . 110
= 110 . ( 36 + 64 )
= 110 . 100
= 11000
a, 39 . 8 + 60 . 2 + 21 . 8
= 39 . 8 + 15 . 4 . 2 + 21 . 8
= 39 . 8 + 15 . 8 + 21 . 8
= 8 . ( 39 + 15 + 21 )
= 8 . 75
= 600
b, 12 . 53 + 53 . 172 - 53 . 84
= 53 . ( 12 + 172 - 84 )
= 53 . 100
= 5300
c, 35 . 34 + 35 . 86 + 65 . 75 + 65. 67 + 65.45
= 35 . ( 34 + 86 ) + 65 . ( 75 + 67 + 45 )
= 35 . 120 + 65 . 187
= 4200 + 12155
= 16355
d, 36 . 28 + 36 . 82 + 64 . 69 + 64 . 41
= 36 . ( 28 + 82 ) + 64 . ( 69 + 41 )
= 36 . 110 + 64 . 110
= 110 . ( 36 + 64 )
= 110 . 100
= 11000
a, 45 x 76 + 90 x 12
b, 2 x 31 x 12 + 4x6 x 69
c, 36 x 28 + 36 x 82 + 64 x 69 + 64 x 41
d, 156 ( x + 61 ) = 82
a) 45 x 76 + 90 x 12
= 45 x 76 + 45 x 2 x 12
= 45 x 76 + 45 x 24
= 45 x ( 76 + 24 )
= 45 x 100
= 4500
b) 2 x 31 x 12 + 4 x 6 x 69
= 24 x 31 + 24 x 69
= 24 x ( 31 + 69 )
= 24 x 100
= 2400
c) 36 x 28 + 36 x 82 + 64 x 69 + 64 x41
= 36 x ( 28 + 82 ) + 64 x ( 69 + 41 )
= 36 x 110 + 64 x 110
= 110 x ( 36 + 64 )
= 110 x 100
= 11 000
d) 156 ( x + 61) = 82
=> x + 61 = \(\frac{82}{156}\)
=> x + 61 = \(\frac{41}{78}\)
=> x = \(\frac{41}{78}\)- 61
=> x = \(\frac{-4717}{78}\)
45 x 76 + 90 x 12 = 45 x 76 + 45 x 2 x 12
= 45 x 76 + 45 x 24
= 45 x (76 + 24)
= 45 x 100
= 4500
b) 2 x 31 x 12 + 4 x 6 x 69 = 62 x 12 + 2 x 12 x 69
= 62 x 12 + 138 x 12
= (62 + 138) x 12
= 200 x 12 = 2400
a, 45 x 76 + 90 x 12
= ( 45 x 12 ) + ( 76 x 90 )
= 540 + 6840
= 7 380
c,
= 36 x ( 28 + 82 ) + 64 x ( 69 + 41 )
= 36 x 110 + 64 x 110
= 110 x ( 36 + 64 )
= 110 x 100
= 11000
a) 2 . 31 . 12 + 4 . 6 . 42 + 8 . 27 . 3
b) 36 . 28 + 36 . 82 + 64 . 69 . 64 . 41
b) 36.28+36.82+64.69+64.41
= 36.(28+82)+64.(69+41)
=36.110+64.110
=(36+64).110
=100.110
=11000.( phần a mk nghĩ sau )
b) = 36 . (28+82) + 64 . (69+41)
= 36 . 110 + 64 . 110
= (36+64) . 110
= 100 . 110
= 11000
a, 2 . 31 . 12 + 4 . 6 . 42 + 8 . 27 . 3
= 2 . 31 . 3 . 4 + 4 . 2 .3 . 42 + 2 . 4 . 27 . 3
= 2 . 3 . 4 ( 31 + 42 + 27 )
= 2 . 3 . 4 . 110
= 2640
