[(25 - 22 . 3) + (32 . 4 + 16)] : 5
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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
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A=\(2^2-9^3+4^{-2}.16-2.5^2\)
\(=4-729+1-50=-774\)
B=\(\left(2^3.2\right).\dfrac{1}{2}+3^{-2}.3^2-7.1+5\)
\(B=2^4.\dfrac{1}{2}+1-7+5=8+1-7+5=7\)
C = 2-3 + (52)3.5-3 + 4-3.16 - 2.32 - 105.(\(\dfrac{24}{51}\))0
C = \(\dfrac{1}{8}\) + 56.5-3 + 4-3.42 - 2.9 - 105.1
C = \(\dfrac{1}{8}\) + 53 + \(\dfrac{1}{4}\) - 18 - 105
C = (\(\dfrac{1}{8}\) + \(\dfrac{1}{4}\)) - (105 - 125 + 18)
C = \(\dfrac{3}{8}\) - (-20 + 18)
C = \(\dfrac{3}{8}\) + 2
C = \(\dfrac{19}{8}\)
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1+2+3+4+5+6+7+8+9+10+11+12+13+14+15+16+17+18+19+20+21+22+23+24+25+26+27+28+29+30+31+32+33+34+35+36+37
=(1+37)x37:2
=703
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1) 2155-(174+2155)+(-68+174-7)-1911-(1234-1911)
=2155-174-2155+(-68)+174-7-1911-1234+1911
=(2155-2155)+(174-174)+(1911-1911)-(68+7+1234)
= 0 + 0 + 0 - 1309
= -1309
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a,25/100 +19/22+19/35+3/4+3/22+16/35
=(19/22+3/22)+(19/35+16/35)+(25/100+3/4)
= 22/22 + 35/35 + ( 1/4 + 3/4)
= 22/22 + 35/35 + 4/4
= 1 + 1 + 1
= 3
b, 2/5 : 4/7 - 2/5 : 2/3
=(2/5 - 2/5) : (4/7 : 2/3)
= 0 : 6/7
=0
[(25 - 22 . 3) + (32 . 4 + 16)] : 5
= [(25 - 4 . 3) + (9 . 4 + 16)] : 5
= [(25 - 12) + (36 + 16)] : 5
= [13 + (36 + 16)] : 5
= [13 + 52] : 5
= 65 : 5
= 13
Dễ mà: [ ( 25 - 22.3) + ( 32 .4+16) : 5
= [ ( 25 - 4.3) + ( 9.4+16) :5
= [ ( 25 - 12) + ( 36 + 16) : 5
= [ 13 + 52] : 5
= 65 : 5
= 13
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