Hãy nhập câu hỏi của bạn vào đây, nếu là tài khoản VIP, bạn sẽ được ưu tiên trả lời.
a) (-25). ( 35-147) + 35. (25-147)
= -875 + 3675 + 875 - 5145
= ( -875 + 875 ) + 3675 - 5145
= 0 + ( - 1470 )
= - 1475
a)1125-374-1125-65+374
=(1125-1125)+(-374+374)-65
=0+0-65
=-65
a/ 1125-(374+1125)+(-65+374)
=1125-374+1125+(-65)+374
=[1125+1125]+[-374+374]+(-65)
=2250+0+(-65)
=2250+(-65)
=2185
b/ -23.63+23.21-58.23
=-23.(63+23-58)
=-23.28
=-644
Đáp án:
a, 38+41+117+159+6238+41+117+159+62
=(38+62)+(41+159)+117=(38+62)+(41+159)+117
=100 +200 +117=100 +200 +117
=417=417
b, 73+86+968+914+303273+86+968+914+3032
=73+(86+914)+(968+3032)=73+(86+914)+(968+3032)
=73+1000 +4000=73+1000 +4000
=5073=5073
c, 341.67+341.16+659.83341.67+341.16+659.83
=341.(67+16)+659.83=341.(67+16)+659.83
=341.83+659.83=341.83+659.83
=83.(341+659)=83.(341+659)
=83.1000=83000=83.1000=83000
d, 42.53+47.156−47.11442.53+47.156-47.114
=42.53+47.(156−114)=42.53+47.(156-114)
=42.53 +47.42=42.53 +47.42
=42.(53+47)=42.100=42.(53+47)=42.100
=4200=4200
e, 563.23+23.26+23563.23+23.26+23
=23.(563+26+1)=23.(563+26+1)
=23.600=23.600
=13800=13800
f, 132+157+43+68132+157+43+68
=(132+68)+(157+43)=(132+68)+(157+43)
=200 +200=400=200 +200=400
g, 49.68+100.34+6849.68+100.34+68
=49.68+50.68+68=49.68+50.68+68
=68.(49+50+1)=68.(49+50+1)
=68.100=6800=68.100=6800
h, 491.(267+53)+491.(151+67)491.(267+53)+491.(151+67)
=491.(267+53+151+67)=491.(267+53+151+67)
=491.538=491.538
=264158=264158
Vote mk nha.
a) \(38 + 41 + 117 + 159 + 62\) \(= (38 + 62) + (41 + 159) + 117\)
\(= 100 + 200 + 117\)
\(=417\)
b) \(73 + 86 + 968 + 914 + 3032\) \(= 73 + (86 + 914) + (968 + 3032)\)
\(= 73 + 1000 + 4000\)
\(=5073\)
c) \(341 \cdot 67 + 341 \cdot 16 + 659 \cdot 83\) \(= 341 \cdot (67 + 16) + 659 \cdot 83\)
\(= 341 \cdot 83 + 659 \cdot 83\)
\(= (341 + 659) \cdot 83\)
\(= 1000 \cdot 83\)
\(=83000\)
e) \(563 \cdot 23 + 23 \cdot 36 + 23\) \(= 563 \cdot 23 + 23 \cdot 36 + 23 \cdot 1\)
\(= 23 \cdot (563 + 36 + 1)\)
\(= 23 \cdot 600\)
\(=13800\) f) \(132 + 157 + 43 + 68\) \(= (132 + 68) + (157 + 43)\)
\(= 200 + 200\)
\(=400\)
g) \(49 \cdot 68 + 100 \cdot 34 + 68\) \(= 49 \cdot 68 + 50 \cdot 68 + 1 \cdot 68\) (vì \(100 \cdot 34 = 50 \cdot 68\))
\(= (49 + 50 + 1) \cdot 68\)
\(= 100 \cdot 68\)
\(=6800\)
thực hiện phép tính bằng cách hợp lí (nếu có thể)
a,136:{[(468+332):160-5]+68}+2014
= 136 : { [ ( 468 + 332 ) : 160 - 5 ] + 68 } + 2014
= 136 : { [ 800 : 160 - 5 ] + 68 } + 2014
= 136 : { [ 5 - 5 ] + 68 } + 2014
= 136 : { 0 + 68 } + 2014
= 136 : 68 + 2014
= 2 + 2014
= 2016
\(136:\left\{\left[\left(468+332\right):160-5\right]+68\right\}+2014\)
\(=136:\left[\left(800:160-5\right)+68\right]+2014\)
\(=136:\left[\left(5-5\right)+68\right]+2014\)
\(=136:\left(0+68\right)+2014\)
\(=136:68+2014=2+2014\)
\(=2016\)
= 35 . 67 - 167 . 35
= 35 . (67 - 167 )
= 35 . ( -100 )
= -3500
35.67+167.(-35)
=35.67+(-167).35
=35.[67+(-167)]
=35.100=3500
Bài 2: Tính nhanh
a) 29 + 132 + 237 + 868 + 3
= 29+(132+858)+(237+3)
=29+990+240
=1259
=(-968+68)+(-35-65)
=-900+(-100)
=-1000
\(-968-35+68-65\)
\(=\left(968-68\right)+\left(-35-65\right)\)
\(=900+\left(-100\right)\)
\(=-1000\)
Chúc bạn học tốt~~~
Mình không chắc nữa nhưng bạn cứ làm thử đi nha !!!!
=(-968+68)+(-35-65) =-900+(-100) =-1000