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= ( -25) x 1 +72 x (-25) + (-25) x27
= (- 25) x ( 1 + 72 + 27 )
= (-25) x 100
=-2500
b
c 37 x ( 25 + 37 ) - 27 x ( 37 + 25 )
= 37 x 25 + 37 x 37 -27x37 -27x25
= ( 37 x25 -27x25 )+(37x37-27+37)
=25 x ( 37 -27 ) + 37 x (37 - 27)
= 25 x10 + 37x10
= 250 + 370
= 770
a) =-25.( 1+72+27)
=-25.100= - 2500
b) = -36.45 + (-36) . 15 - (-36) . 40
= - 36. ( 45+15-40)
= -36 . 20= -720
c) =37.62 - 27 .62
= 62. ( 37 - 27 )
= 62 . 10
= 620
a, 568 + 568 x 135 - 568 x 36
= 568 x ( 1 + 135 - 36)
= 568 x 100
56 800
b, 17 x 49 + 49 x 37 + 54 x 26 + 54 x 25
= 49 x ( 17 + 37) + 54 x ( 26 + 25 )
= 49 x 54 + 54 x 51
= 54 x ( 49 + 51)
= 54 x 100
= 5 400
c, 14 x 35 x 5 + 10 x 25 x 7 + 20 x 70
= ( 2 x 35) x ( 7 x 5) + ( 10 x 7) x 25 + 20 x 70
= 70 x 35 + 70 x 25 + 20 x 70
= 70 x ( 35 + 25 + 20)
= 70 x 80
= 5 600
a) 568 + 568 x 135 - 568 x 36
= 568 x ( 1+1+135-1-36 )
=568 x 100
=5680
b) 17 x 49 + 49 x 37 + 54 x 26 + 54 x 25
= 49 x ( 17 + 37 ) + 54 x ( 26 + 25 )
= 49 x 54 + 54 x 51
= 54 x ( 49 + 51 )
= 54 x 100
= 5400
c) 14 x 35 x 5 + 10 x 25 x 7 + 20 x 70
= 70 x 35 + 10 x 25 x 7+ 20 x 70
= 70 x 35 + 250 x 7 + 20 x 70
= 70 x 35 + 70 x 25 + 20 x 70
= 70 x (35+25+20)
= 70 x 80
= 5600
a, (-25) + 276 - (276 - 25)
= (-25) + 276 - 276 + 25
= [ (-25) + 25] - (276 - 276)
= 0 - 0
= 0
b, 24 x 46 + 24 x 53 + 24
= 24 x ( 46 + 53 + 1)
= 24 x 100
= 2400
a. 4.37.25.50.12
=(4.25).(50.12).37
=100.600.37
=2220000
\(a.\left(4.50\right).\left(25.12\right).37\)
\(=200.300.37=2220000\)
\(b.\left(46+54\right)+\left(17+83\right)\)
\(=100+100=200\)
\(c.87.\left(36+69\right)=87.105=9135\)
\(d.\left(135+65\right)+\left(360+40\right)\)
\(=200+400=600\)
\(e.\left(463+137\right)+\left(318+22\right)\)
\(=600+340=940\)
a. 59 + 296
= ( 59 + 1 ) + 295
= 60 + 295
= 355
b) 592 + 48
= ( 592 + 8 ) + 40
= 600 + 40
= 640
Các câu sau tương tự
\(a,1357-\left(964+357\right)-\left(36+120\right)=1357-964-357-36-120\)
\(=1000-1000-120=-120\)
\(b,10000-\left(137+572\right)+\left(263-291\right)=10000-137-572+263-291\)
\(=10000-709-291+263=10000-1000+263=9000+263=9263\)
\(c,35\cdot125+35\cdot75-70\cdot50=35\cdot125+35\cdot75-35\cdot100\)
\(=35\cdot\left(125+75-100\right)=35\cdot100=3500\)
(\(\cdot\)là nhân nhé bạn)
\(d,2-4+6-8+...+98-100=-2-2-...-2\)
(50 số hạng -2)
\(=\left(-2\right)\cdot50=-100\)
Làm lại câu d:
\(d,2-4+6-8+...+98-1000=-2-2-...-2+98-1000\)
(49 số -2)
\(=\left(-2\right)\cdot49+98-1000=-98+98-1000=1000\)
a) 135 . (-27) + 27 . 235
= 27 . (235 - 135)
= 27 . 100
= 2700
b) 36 . (-125) - 125 . (-46)
= 125 . (-36 + 46)
= 125 . 10
= 1250
c) 32 . (-64) - 64 . 68
= 64.(-32 - 68)
= 64.(-100)
= -6400
d) (145 - 45) . (-31) + 31 . (-100)
= 100 . (-31) + 31.(-100)
= 100.(-31 - 31)
= 100.(-62)
= -6200
a)
=(-135)x27+27x235
=27x[+(235+135)]
=27x31725
=856575
b)
=(-36)x125-125x(-46)
=125x[-(36+46)]
=125x(-1656)
=-207000
c)
=(-32)x64-64x68
=64x[-(68-32)]
=64x(-36)
=-(64x36)
=-2304
d)
=100x(-31)+31x(-100)
=(-100)x31+31x(-100)
=31x[-(100+100)]
=31x(-200)
=-(31x200)
=-6200
chúc học tốt nhớ tích cho tui nha
a)(-12)+(-13)+36+(-1)
={[(-12)+(-1)]+(-13)}+36
={(-13)+(-13)}+36
=(-26)+36
=10
b)25+37-48-25-37
=[25+(-25)]+(37-37)-48
=0+0-48
=0-48
=-48
c)2575+37-2576-29
=(2575-2576)+(37-29)
=(-1)+8
=7
d)34+35+36+37-14-15-16-17
=(34-14)+(35-15)+(36-16)+(37-17)
=10+10+10+10
=10.4
=40
*Lưu ý:Dấu . là dấu x
a/ (-12)+(-13)+36+(-1)
=(-12)+(-13)+(-1)+36
=(-26)+36
=10
b/ 25+37-48-25-37
=(25-25)+(37-37)-48
=0+0-48
=-48
c/ 2575+37-2576-29
=2575-2576+37-29
=(-1)+8
=-7
tick cho mình tròn 510 nha
a) 36 . 37 + 36 . 62 + 36
= 36 . 37 + 36 . 62 + 36 . 11
= 36 . ( 37 + 62 + 1 )
= 36 . 100
= 3600
b) 116, 08 : 0,01 x 3,54 x 2000 - 3,6 : 0,02
= 11,608 x 3,54 x 2000 - 180
= 41,09232 x 2000 - 180
= 82,18464 - 180
= 82,200464
c) ( 72 x 135 + 9 x 65 x 8 ) : 25 - 3500 : 35
= ( 9720 + 4680 ) : 25 - 3500 : 35
= 14400 : 25 - 3500 : 35
= 576 - 100
= 476
a, 36x37+36x62+36 c, (72x135+9x65x8):25-3500:35
=36x37+36x62+36x1 =(9720+4680):25-3500:35
=36x(37+62+1) =14400:25-3500:35
=36x100 =576-100
=3600 =476
b,116,08:0,01x3,54x2000-3,6:0,02
=(116,08:0,01)x(3,54x2000)-(3,6:0,02)
=11608x7080-180
=82184640-180
=82184460