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Bài 1: Thực hiện các phép tính sau:
\(a)\)Chưa rỏ đề
\(b)\)\(5025\div5-25\div5\)
\(=\)\(1005-5\)
\(=\)\(1000\)
\(c)\)\(218-180\div2\div9\)
\(=\)\(218-10\)
\(=\)\(208\)
\(d)\)\(\left(328-8\right)\div32\)
\(=\)\(320\div32\)
\(=\)\(10\)
Bài 1:
a) ( Tôi không nhìn rõ đầu bài )
b) 5025 : 5 - 25 : 5
= ( 5025 - 25 ) : 5
= 5000 : 5
= 1000
c) 218 - 180 : 2 : 9
= 218 - 180 : ( 2 . 9 )
= 218 - 180 : 18
= 218 - 10
= 208
d) ( 328 - 8 ) : 32
= 320 : 32
= 10
15.{550: [450-(3.5^3-2^3.25)]}
= 15.{550: [ 450-(3.125-8.25)]}
= 15.{550:[ 450-( 375-200)]}
= 15.{550:[450- 175]}
=15.{550: 275}
= 15. 2
= 30
15 . { 550 : [ 450 - ( 3 . 53 - 23 . 25 )]}
= 15 . { 550 : [ 450 - ( 3 . 125 - 8 . 25 )]}
= 15 . { 550 : [ 450 - ( 375 - 200 )]}
= 15 . { 550 : [ 450 - 175 ]}
= 15 . { 550 : 275 }
= 15 . 2
= 30.
#Y/n
\(a,3^3+3^2-\left(2^7:2^5+7^8:7^7\right)=27+9-\left(2^2+7\right)=36-11=25\)
\(b,27.77+27.27-27=27\left(77+27-1\right)=27.103=2781\)
\(c,52:\left(43-30\right)+144-16=52:13+128=4+128=132\)
\(f,3^2.101-3^2.101^0=3^2\left(101-101^0\right)=9\left(101-1\right)=9.100=900\)
a) \(\dfrac{3}{10}\)
b) \(\dfrac{9}{28}\)
c) \(\dfrac{88}{195}\)
a) (-5) + (-10) + 20
= 20 - 5 - 10
= 5
b) 29 + (-40) + (-12)
= 29 - 40 - 12
= -23
c) 58 + (-14) + (-73)
= 58 - 14 - 73
= -29
\(a\text{)}\left(-5\right)+\left(-10\right)+20\)
\(=\left(-15\right)+20\)
\(=5\)
\(b\text{)}29+\left(-40\right)+\left(-12\right)\)
\(=\left(-11\right)+\left(-12\right)\)
\(=-23\)
\(c\text{)}58+\left(-14\right)+\left(-73\right)\)
\(=44+\left(-73\right)\)
\(=-29\)
\(\text{Hok tốt!}\)
\(\text{@Kaito Kid}\)
a: \(\left(-2\right)^3-45:\left(-3\right)^2+\left(-2019\right)^0\cdot1^{2019}\)
\(=-8-45:9+1\)
\(=-8-5+1\)
=-13+1
=-12
b: \(11^{25}:11^{13}-3^5:\left(1^{10}+2^3\right)-60\)
\(=11^{25-13}-3^5:3^2-60\)
\(=11^{12}-27-60\)
\(=11^{12}-87\)
Bài 2:
a: A=(12,87+14,13)+(-14,7-37,3)
=27-52=-25
b: B=-1/3+2/5-2/3-3/5+1/5
=-1
a.
\(180-\left(150.2+180.3-175.4\right)=180-\left(300+540-700\right)\)
\(=180-140=40\)
b. \(200:\left\{2.\left[32-\left(35-2^3\right)\right]+30\right\}=200:\left\{2.\left[32-\left(35-8\right)\right]+30\right\}\)
\(=200:\left\{2.5+30\right\}=200:40=5\)