Tính nhanh:
2195 . 1952 - 952 . 247 - 1952 . 1768
98 . 7676 - 9898 . 76
123 . 456456 - 456 . 123123
2195. 1952 - 952 . 427 - 1952 . 1768
tính nhanh
tính hợp lí:
a:{44:52*60}:{11*13*15}
b:123*456456-456*123123
c:{98*7676-9898*76}:{2001*2002*2003*...2010}
Tính hợp lý nhất
a. (44×52×60) : (11×13×15)
b. 123×456456 - 456×123123
c. (98×7676-9898×76): (2001×2002×2003...2010)
a, 44.52.60
11.13.15
= 4.4.4=64
thẳng hàng rút gọn VD: 44:11; 52:13.;;
a. (44.52.60) : (11×13×15)
= ( 44: 11).(52:13).(60:15)
= 4.4.4 =43
b. 123.456456 - 456.123123
=123.456.1001-456.123.1001
=0
c. (98.7676-9898.76): (2001×2002×2003...2010)
=( 98.76.101-98.101.76): (2001×2002×2003...2010)
=0: (2001×2002×2003...2010)
=0
"." là nhân
a)(44*52*60)/(11*13*15)
b)123*456456-456*123123
c)(98*7676-9898*76)/(2001*2002*2003*2004*2005*2006*2007*2008*2009*20100)
ccac ban nho giup do nha.cau nay ttinh bang cach hop ly
Giúp tui tí :
Câu 1 :123 . 456456 - 456 . 123123
Câu 2 :( 98 . 7676 - 9898 . 76 ) . ( 2001 . 2002 . 2003 ... 2010 )
( CẦN GẤP )
{123.456456} - {456.123123}
=56144088 - 56144088
0
CAU2
{98.7676 - 9898 . 76 } . {2001 . 2002 . 2003 ... 2010
={752248 - 752248 } . {2010 - 2001 + 1 = 10}
=0 . 10
=0
SỐ 3 : TÍNH NHANH
A = [ - 506 + 732 - ( - 2000) ] - ( 506 - 1732 )
B = 38 + 41 + 117 + 159 + 62
C = 73 + 86 + 968 + 914 + 3032
D = 123 x 456456 - 456 x 123123
E = ( 98 x 7676 - 9898 x 76 ) : ( 2001 x 2002 x 2003 ...... 2009 )
F = 1000 x ( 456 x 789789 - 789 x 456456 )
M = 1031 + { [ 743 - [ 1031 - ( + 57 ) ] }
A = [ -506 + 732 - ( -2000 )] - ( 506 - 1732 )
A = [ 226 - ( -2000 )] - ( 506 - 1732 )
A = 2226 - ( -1226 )
A = 3452
B = 38 + 41 + 117 + 159 + 62
B = ( 38 + 62 ) + (41 + 159) + 117
B = 100 + 200 + 117
B = 417
C = 73 + 86 + 968 + 914 + 3032
C = ( 86 + 914 ) + ( 968 + 3032 ) + 73
C = 1000 + 4000 + 73
C = 5073
D = 123 x 456456 - 456 x 123123
D = 123x456x1001-456x123x1001
D = 56088 x 1001 - 56088 x 1001
D = 1001x ( 56088 - 56088 )
D = 1001 x 0
D = 0
F = 1000 x ( 456 x 789789 -789 x 456456 )
F = 1000 x 0
F =0
A = [ -506 + 732 - ( -2000 )] - ( 506 - 1732 )
A = [ 226 - ( -2000 )] - ( 506 - 1732 )
A = 2226 - ( -1226 )
A = 3452
B = 38 + 41 + 117 + 159 + 62
B = ( 38 + 62 ) + (41 + 159) + 117
B = 100 + 200 + 117
B = 417
C = 73 + 86 + 968 + 914 + 3032
C = ( 86 + 914 ) + ( 968 + 3032 ) + 73
C = 1000 + 4000 + 73
C = 5073
D = 123 x 456456 - 456 x 123123
D = 123x456x1001-456x123x1001
D = 56088 x 1001 - 56088 x 1001
D = 1001x ( 56088 - 56088 )
D = 1001 x 0
D = 0
F = 1000 x ( 456 x 789789 -789 x 456456 )
F = 1000 x 0
F =0
TK nha
1 . 25 x { 32 : [ 12 - 4 + 4 x ( 16 : 8 ) ] }
2. 2195 x 1952 - 952 x 427 - 1952 x 1768
`Answer:`
1. \(25.\left\{32:[12-4+4.\left(16:8\right)]\right\}\)
\(=25.\left\{32:[12-4+4.2]\right\}\)
\(=25.\left\{32:[12-4+8]\right\}\)
\(=25.\left\{32:[8+8]\right\}\)
\(=25.\left\{32:16\right\}\)
\(=25.2\)
\(=50\)
2. \(2195.1952-952.427-1952.1768\)
\(=2195.1952-1952.1768-952.427\)
\(=\left(2195-1768\right).1925-952.427\)
\(=427.1952-952.427\)
\(=\left(1952-952\right).427\)
\(=1000.427\)
\(=427000\)
Thực hiện các phép tính sau bằng cách hợp lý nhất:
a. 123 . 456456 - 456 . 123123
b. ( 98 . 7676 - 9898 . 76 ) : ( 2001 . 2002 ...... 2010 )
các anh chị giúp em giải mấy bài này với !
a) (3158 - 1453 ) - ( 3172 - 1473 )
b) 102 - 96 + 90 - 84 + 78 - 72 + 66 - 60 + 54 - 48 .
c ) { 145 - [130 . (246 - 236 ) ] : 2 } .5.
d ) ( 44 . 52 . 60 ) : ( 11,13.15).
e ) 123 . 456456 - 456 . 123123 .
f ) ( 98 . 7676 - 9898 . 76 ) : ( 2001 . 2002 ..... 2016 ).