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!@
a) 35 . 34 + 35 . 38 + 65 . 75 + 65 . 45
b) 39 . 8 + 60 . 2 + 21 . 8
c) 36 . 28 + 36 . 82 + 64 . 69 + 64 . 4
d) 123 . 1001
<<TÍNH NHANH GIÚP MÌNH NHA !!! >>
Bài làm :
\(a,35.34+35.38+65.75+65.45\)
\(=35.\left(34+38\right)+65.\left(74+45\right)\)
\(=35.72+65.120\)
\(=2520+780\)
\(=10320\)
\(b,39.8+60.2+21.8\)
\(=\left(39+21\right).8+60.2\)
\(=60.8+60.2\)
\(=60.\left(8+2\right)\)
\(=60.10=600\)
\(c,36.28+36.82+64.69+64.4\)
\(=36.\left(28+82\right)+64.\left(69+4\right)\)
\(=36.110+64.73\)
\(=3960+4672\)
\(=8632\)
\(d,123.1001\)
\(=123123\)
Học tốt
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
Tính hợp lí
A.35 x 34 + 35 x 38 + 65 x 75 + 65 x 45
B. 12x 53 + 53 x 172 - 53 x 84
C. 35 x 28 + 36 x 82 + 64 x 69 + 64 x 41
D. A = 1+2+3+...+100
E. B =17+19+...+101+103
G. D= 3x (12+13+14+15) + 3x(8+7+6+5)
A.35 x 34 + 35 x 38 + 65 x 75 + 65 x 45
Câu này không tính hợp lí được
B. 12x 53 + 53 x 172 - 53 x 84
= 53 x (12 + 172 - 84)
= 53 x 100
= 5300
C. 36 x 28 + 36 x 82 + 64 x 69 + 64 x 41
= 36 x (28+82) + 64 x (69+41)
= 36 x 110 + 64 x 110
= (36+64) x 110
= 100 x 110
= 11 000
D. A = 1+2+3+...+100
= (1+ 100) x 50
= 101 x 50
= 5050
E. B =17+19+...+101+103
= (103 +17) x [(103 - 17):2 + 1]
= 120 x 44
=5280
G. D= 3x (12+13+14+15) + 3x(8+7+6+5)
= 3 x (5+6+7+8+12+13+14+15)
= 3 x (20 x 4)
= 3 x 80
=240
a) 10320
b) 5300
c) 11000
d) 5050
e) 2460
g) 240
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
tính nhanh
35. 34 + 70. 38 + 65. 75 + 65. 35
giúp mik với. mik cần gấp lắm
\(35\cdot34+70\cdot38+65\cdot75+65\cdot35\)
\(=35\cdot34+35\cdot76+65\cdot\left(75+35\right)\)
\(=35\cdot\left(34+76\right)+65\cdot110\)
\(=35\cdot110+65\cdot110\)
\(=110\cdot\left(65+35\right)\)
\(=110\cdot100=11000\)
35 . 34 + 70 . 38 + 65 . 75 + 65 . 35
= 35 . 34 + 35 . 76 + 65 . 75 + 65 . 35
= 35 . (34 + 76) + 65 . (75 + 35)
= 35 . 110 + 65 . 110
= 110 . (35 + 65)
= 110 . 100
= 11000
~Std well~
\(35\cdot34+70\cdot38+65\cdot75+65\cdot35\)
\(=35\cdot34+35\cdot76+65\cdot75+65\cdot35\)
\(=35\cdot\left(34+76\right)+65\cdot\left(75+35\right)\)
\(=35\cdot110+65\cdot110\)
\(=110\cdot\left(35+65\right)\)
\(=110\cdot100=11000\)
Bài 1 :
36 . 28 + 69 . 69 + 36 . 82 + 65 . 41 - 110
700 : 25 = ; 84 : 7 ; 108 : 9 ; 15 . 28 ; 125 . 48
Bài 2 : Tính nhanh
a) 35 . 34 + 65 . 75 + 35 . 86 + 65 . 45
b) 2 . 25 . 8 + 4 . 37 . 6 + 2 . 38 . 12
c) 108 + 16 . 216 - 2 . 108
d) 65 . 3 . 130 + 15 . 65
giúp bạn làm bài này với
Tính nhanh
a) 35*34+35*86+65*75+65*45
b)3*25*8+4*37*6+2*38*12
giúp bạn với
a, 35.(34+86) + 65.(75+45)
=35.120 + 65.120
=120.(35+65)
=120. 100
=12000
a) 35 * 34 + 35 * 86 + 65 * 75 + 65 * 45
= 35 x ( 34 + 86 ) x 65 x ( 75 + 45 )
= 35 x 120 x 65 x 120
= 120 x ( 35 + 65 )
= 120 x 100
= 12000
b, 24.25+24.37+24.38
=24(25+37+38)
=24.100
=2400
tính nhanh
35*34+35*38+65*75+65*45
35x34+35x38+65x75+65x45
=35x(34+38)+65x(75+45)
=35x72+65x120
=2520+7800
=10320
=35*(34+38)+65*(75+45)
=35*70+65*120
=2450+7800
=10250
35.34 + 35.38 + 65. 75 + 65- 45
= [35.(34+38)] + [65.(75+45)]
= (35.72) + (65.120)
= 2520 + 7800
= 10320
Tinh nhanh 35 . 34 + 35 . 38 + 65 . 75 + 65 . 75 + 65 . 45
35 . 34 + 35 . 38 + 65 . 75 + 65 . 75 + 65 . 45
= 35 . 65 . ( 34 + 38 + 75 + 75 + 45 )
= 2275 . 267
= 607425
Xin mọi người đừng k sai mình nhé !
35.34+35.38+65.75+65.75+65.45
=35.(34+38).65.(75+75+45)
=35.72.65.195
=3191000
35.( 34+ 38) + 65 . (75 + 75 + 45)
35 . 72 + 65 . 195
2520 + 12675
15195