Tính.
a) 54 + 29 - 8 b) 62 - 38 + 7
Đặt tính rồi tính.
a) 62 x 41
54 x 23
b) 176 x 32
1 042 x 57
Đặt tính rồi tính.
a) 3 458 + 639 38 794 + 89 152 62 928 - 45 636
b) 815 x 6 509 x 37 8962 : 28
(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.
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=?
b1 :
5 , 31 + 62 x 20 + 31 x 59
6, -19 + 38 x 22 + 31 x 59
7, 54 ( -11 - 32 ) - 32 (89 - 54 )
8,2018 x 31 - 2018 ( -19 ) + 2018 x 50
9, 16 x 34 - (-16 ) x 21 + 55 x 16
10 , 29 x 63 - 63 x 31 - 63 x 98
ai làm hết mkcho 10 tick trong 1 buổi tối
5, 31+1240++1829=3100
6. -19+836+1829=2646
7. 54.43-32.35=2322-1120=1202
8 2018(31+16+50)=2018.97=195746
9. 16(34-21+55)=16.68=1088
10. 63(29-31-98)=63.(-100)=-6300
Đặt tính rồi tính.
a) 15 480 + 66 059
b) 52 133 – 8 091
c) 8 205 x 6
d) 29 376 : 9
38:( 54 + 60) -62 : 72
Đặt tính rồi tính.
a) 36 + 7 5 + 48 29 + 64
b) 73 – 6 82 – 57 91 – 85
a) \(36+7=43\)
\(5+48=53\)
\(29+64=93\)
b) \(73-6=67\)
\(82-57=25\)
\(91-85=6\)
a: 36+7=43
5+48=53
29+64=95
b: 73-6=67
82-57=25
91-85=6