12+62+51+455+96+68+1
1 * 2 * 3 * 4 * 5 * 6 * 7 * 8 * 9 * 10 * 11 * 12 * 13 * 14 * 15 * 16 * 17 * 18 * 19 * 20 * 21 * 22 * 23 * 24 * 25 * 26 * 27 * 28 * 29 * 30 * 31 * 32 * 33 * 34 * 35 * 36 * 37 * 38 * 39 * 40 * 41 * 42 * 43 * 44 * 45 * 46 * 47 * 48 * 49 * 50 * 51 * 52 * 53 * 54 * 55 * 56 * 57 * 58 * 59 * 60 * 61 * 62 * 63 * 64 * 65 * 66 * 67 * 68 * 69 * 70 * 71 * 72 * 73 * 74 * 75 * 76 * 77 * 78 * 79 * 80 * 81 * 82 * 83 * 84 * 85 * 86 * 87 * 88 * 89 * 90 * 91 * 92 * 93 * 94 * 95 * 96 * 97 * 98 * 99 * 100 bằng bao nhiêu?
1+2+3+4+5+6+7+8+9+10+11+12+13+14+15+16+17+18+19+20+21+22+23+24+25+26+27+28+29+30+31+32+33+34+35+36+37+38+39+40+41+42+43+44+45+46+47+48+49+50+51+52+53+54+56+57+58+59+60+61+62+63+64+65+66+67+68+69+70=?
(5346-2808):54+51
187.(38+62)-87.(62+38)
25.{32:[12-4+4.(16:8)]}
A=50+51+52+.......+99+100
(5346-2808) : 54 + 51
=2538 : 54 + 51
= 47 + 51 = 98
187 . ( 38 + 62 ) - 87 . (62 + 38 )
=187 . 100 - 87 . 100
= 100 . ( 187 - 87 )
= 100 . 100
= 10000
25. { 32 : [12 -4 + 4 . ( 16 : 8 )]}
= 25. { 32 : [12 - 4 + 8]}
= 25 . { 32 : [8 + 8 ]}
= 25 . { 32 : 16 }
= 25 . 2 =50
A = 50 +51 + 52 + ......+ 99+100
A = ( 100 + 50 ) . 51 : 2
A = 150 .51 : 2
A = 7650 : 2
A = 3825
Chuc ban hoc tot
\(\left(5346-2808\right):54+51\)
\(=2538:54+51\)
\(=47+51=98\)
\(187\left(38+62\right)-87\left(62+38\right)\)
\(=187.100-87.100\)
\(=100\left(187-87\right)\)
\(=100.100=10000\)
\(25\left\{32:\left[12-4+4\left(16:8\right)\right]\right\}\)
\(=25\left\{32:\left[12-4+4.2\right]\right\}\)
\(=25\left\{32:\left[12-4+8\right]\right\}\)
\(=25\left\{32:16\right\}\)
\(=25.2=50\)
\(A=50+51+52+......+100\)
\(=\dfrac{\left[\left(100-50\right):1+1\right]\left(100+50\right)}{2}\)
\(=3825\)
(5346 - 2808) : 54 + 51
= 2538 : 54 + 51
= 47 + 51
= 98
187 . (38 + 62) - 87 . (62 + 38)
= 187 . 100 - 87 . 100
= (187 - 87) . 100
= 100 . 100
= 10000
25 . {32 : [12 - 4 + 4 . (16 : 8)] }
= 25 . (32 : 8 + 4 . 2)
= 25 . (4 + 8)
= 25 . 4 + 25 . 8
= 100 . 200
= 20000
A = 50 + 51 + 52 +.......+ 99 + 100
A có : (100 - 50) : 1 + 1= 51 (phần tử)
\(\Rightarrow\) A = (100 + 50) . 51 : 2 = 3825.
12+62+51+24+58+245
số đó là
452
ai k mình mình
k lại cho
mình hứa đó
12+32+62+51+24+9
số đó là
190
ai ủng hộ
mình mình
ủng hộ
lại cho
So do la:190
K mình nha!!!Mình ủng hộ lại cho!!!!!DATTEBAYO!!!!
12+32+51+62+58+92
12+32+51+62+58+92
bằng 307
nha bn k mk nha bn
T H A N K Y O U
số đó là
307
ai k mình
mình k alijc ho
Tính hợp lí:
a, 25 - (62 + 25 - 12)
b, -24 - (68 - 24) + 2.[34 + (-94)]
c, (101 + 102 + 103 + .... + 200) + (-1 - 2 - 3 - ..... - 100)
a, =25- 62-25 +12
= (25-25)+12-62
= -50
b, = -24 -68+24 + 2. (-60)
= (-24+24)-68 + -120
= -188
c,
1 tính nhanh c) 53(51 + 4 ) 53 ( 49 + 96) + 53 d) 3+6+9+12+....+123+126
c: =53*55+53*145+53
=53*201
=10653
d: Số số hạng là (126-3):3+1=42(số)
Tổng là (126+3)*42/2=2709
1/4 × 2/6 × 3/8 × 4/10 × 5/12.......30/62 × 31/64 = 2x
\(\Rightarrow\dfrac{1}{2.2}.\dfrac{2}{2.3}.\dfrac{3}{2.4}.\dfrac{4}{2.5}.\dfrac{5}{2.6}...\dfrac{30}{2.31}.\dfrac{31}{2.32}\) = 2x
\(\Rightarrow\dfrac{1}{2}\left(\dfrac{1}{2}.\dfrac{2}{3}.\dfrac{3}{4}.\dfrac{4}{5}.\dfrac{5}{6}...\dfrac{30}{31}.\dfrac{31}{32}\right)\) = 2x
\(\Rightarrow\dfrac{1}{2}\left(\dfrac{1.2.3.4.5...30.31}{2.3.4.5...31.32}\right)\) = 2x
\(\Rightarrow\dfrac{1}{2}.\dfrac{1}{32}=2x\)
\(\Rightarrow2x=\dfrac{1}{64}\)
\(\Rightarrow x=\dfrac{\dfrac{1}{64}}{2}=\dfrac{1}{64}.\dfrac{1}{2}=\dfrac{1}{128}\)
bạn ơi giải thích giúp mình với [ 1/2x có bằng 4x hay không ạ]