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a)\(48x19+48x115+134x52\)
\(=48x\left(19+115\right)+134x52\)
\(=48x132+132x52\)
\(=132x\left(48+52\right)\)
\(=132x100=13200\)
b)\(27x121-87x27+73x34\)
\(=27x\left(121-87\right)+73x34\)
\(=27x34+73x34\)
\(=34x\left(27+73\right)\)
\(=34x100=3400\)
c)\(125x98-125x46-52x25\)
\(=125x\left(98-46\right)-52x25\)
\(=125x52-52x25\)
\(=52x\left(125-25\right)\)
\(=52x100=5200\)
d)\(136x23+136x17-40x36\)
\(=136x\left(23+17\right)-40x36\)
\(=136x40-40x36\)
\(=40x\left(136-36\right)\)
\(=40x100=4000\)
e)\(17x93+116x83+17x23\)
\(=17x\left(93+23\right)+116x83\)
\(=17x116+116x83\)
\(=116x\left(17+83\right)\)
\(=116x100=11600\)
g)\(19x27+47x81+19x20\)
\(=19x\left(27+20\right)+47x81\)
\(=19x47+47x81\)
\(=47x\left(19+81\right)\)
\(=47x100=4700\)
h)\(87x23+13x93+70x87\)
\(=87x\left(23+70\right)+13x93\)
\(=87x93+13x93\)
\(=93x\left(87+13\right)\)
\(=93x100=9300\)
Mk đã mất công zậy rùi nên mong mọi người k mk nhé
a) = 13400
b) = 4714
c) = 5200
d) = 4000
e) = 11600
g) = 4700
h) = 9300
\(A=\frac{595959}{454545}-\frac{14141414}{15151515}\)
\(A=\frac{595959:10101}{454545:10101}-\frac{14141414:1010101}{15151515:1010101}\)
\(A=\frac{59}{45}-\frac{14}{15}\)
\(A=\frac{59}{45}-\frac{42}{45}=\frac{17}{45}\)
\(B=\frac{65+891+135+909}{731-47+69-253}\)
\(B=\frac{\left(65+135\right)+\left(891+909\right)}{\left(731+69\right)-\left(47+253\right)}\)
\(B=\frac{200+1800}{800-300}=\frac{2000}{500}=4\)
48 x 19 + 48 x 115 + 134 x 52
= 48 x (19+115) + 134 x 52
= 48 x 134 + 124 x 52
= 134 x ( 48 + 52)
= 134 x 100
= 13400
48 x 19 + 48 x 115 + 134 x 52 = 912 + 5520 + 6968
= 13350
Ai click cho mik , mik click lại cho !!!!!!!!!!!!!!!!!!!!!!!!!
a) 48 x 19 + 48 x 115 + 134 x 52
= 48 x ( 19 + 115 ) + 134 x 52
= 48 x 134 + 134 x 52
= ( 48 + 52 ) x 134
= 100 x 134
= 13 400
b) 17 x 93 + 116 x 83 + 17 x 23
= 17 x 93 + 17 x 23 + 116 x 83
= 17 x ( 93 + 23 ) + 116 x 83
= 17 x 116 + 116 x 83
= ( 17 + 83 ) x 116
= 100 x 116
= 11 600
c) 35 x 23 + 35 x 41 + 64 x 65
= 35 x ( 23 + 41 ) + 64 x 65
= 35 x 64 + 64 x 65
= ( 35 + 65 ) x 64
= 100 x 64
= 6 400
a,48x19+48x115+124x52
=48x(19+115)+124x52
=48x124+124x52
=124x(48+52)
=124x100
=12400
b,27x121-87x27+73x34
=27x(121-87)+73x34
=27x34+73x34
=34x(27+73)
=34x100
=3400
c,125x98-125x46-52x25
=125x(98-46)-52x25
=125x52-52x25
=52x(125-25)
=52x100
=5200
d,136x23+136x17-40x36
=136x(23+17)-40x36
=136x40-40x36
=40x(136-36)
=40x100
=4000
e,17x93+116x83+17x23
=17x93+17x23+116x83
=17x(93+23)+116x83
=17x116+116x83
=116x(17+83)
=116x100
=11600
g,19x27+47x81+19x20
=19x27+19x20+47x81
=19x(27+20)+47x81
=19x47+47x81
=47x(19+81)
=47x100
=4700
h,87x23+13x93+70x87
=87x23+70x87+13x93
=87x(23+70)+13x93
=87x93+13x93
=93x(87+13)
=93x100
=9300
Nhớ like mik nhé!^-^ Mất bao thời gian của mik đấy!
1, 69. (-74) - 31 . 74
= (-69) . 74 - 31 . 74
= 74(-69 - 31)
= 74(-100)
= -7400
2, (-2020) . 35 - 2020 . 65
= 2020 . (-35) - 2020 . 65
= 2020(-35 - 65)
= 2020(-100)
= -202000
3, -23 . 59 - 159 . 23
= 23 . (-59) - 159 . 23
= 23(-59 - 159)
= 23 . (-218)
= -5014
4, -147 . 47 + (-47)(-47) - 300
= -147 . 47 + 47 . 47 - 300
= 47(-147 + 47) - 300
= 47 . (-100) - 300
= -4700 - 300
= -5000
5, (-72) . 30 - 31 . (-30) + 3 + 30
= (-72) . 30 + 31 . 30 + 3 + 30
= 30(-72 + 31 + 1) + 3
= 30 . (-40) + 3
= -1200 + 3
= -1197
6, (-82)(-55) + (-82) + (-46)(-82)
= (-82)(-55 + 1 - 46)
= (-82)(-100)
= 8200
7, (-41) . 135 + 135 . (-24) - 35 . (-65)
= 135(-41 - 24) - 35(-65)
= 135(-65) - 35(-65)
= (-65)(135 - 35)
= -65(100)
= -6500
10, 125 . (-88)
= 1000 . \(\frac{1}{8}\) . (-88)
= 1000 . (-11)
= -11000
Câu 8 với 9 mình ko hiểu nên ko giúp bn được
Chúc bạn học tốt!
a) $420-(71+420)$
$=420-71-420$
$=-71$
b) $(35-120)+(120+410-35)$
$=35-120+120+410-35$
$=(35-35)+(-120+120)+410$
$=410$
c) $(320-15+49)-(85-51)$
$=320-15+49-85+51$
$=320+(-15-85)+(49+51)$
$=320+(-100)+100$
$=320$
d) $-(312+59)-(41+400+88)$
$=-312-59-41-400-88$
$=(-312-88)+(-59-41)-400$
$=-400+(-100)-400$
$=-500-400$
$=-900$
e) $(430-731)-(-731+430-56)$
$=430-731+731-430+56$
$=(430-430)+(-731+731)+56$
$=56$
f) $(1352-47)-(53-1000+1352)$
$=1352-47-53+1000-1352$
$=(1352-1352)+(-47-53)+1000$
$=(-100)+1000$
$=1000-100$
$=900$
h) $(-42)-(370+58)-(120-370)$
$=-42-370-58-120+370$
$=(-42-58)+(-370+370)-120$
$=-100-120$
$=-220$
$Toru$
a) 27.121-87.27+73.34
=27.(121-87)+73.34
=27.34+73.34
=34(27+73)
=34.100
=3400
b) 48.19+134.52+48.115
=48.19+48.115+134.52
=48(19+115)+134.52
=48.134+134.52
=134(48+52)
=134.100
=13400
c) 65+891+135+909/731-47+69-253
VT:(65+135)+(891+909)
=200+1800
=2000
VP:(731+69)-(253+47)
=800-300
=500
2000/500=4
d)18.123+9.4576.2+3.5310.6/1+4+7+..+55+58-410
VT:18.123+18.4567+18.5310
=18(123+4567+5310)
=18.10009
=18(10000+9)
=180000
VP:Tổng : 1+4+7+...+55+58
Có số số hạng là :
(58-1):3+1=20( số )
Tổng bằng : (58+1).20:2=590
590-410=180
180000:180=1000
Mình chữa câu d tí 9.4576.2 là sai ;;; 9.4567.2 mới đúng
sao ko ai giúp em vậy
gianroi