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a) 220 - [32 . 33 - (12 - 70) 2]
= 220 - [9 . 27 - (12 - 1)2]
= 220 - [9 . 27 - 112]
= 220 - [9 . 27 - 121]
= 220 - [243 - 121]
= 220 - 122
= 98
b) [504 - (52 . 8 + 70) : 33 + 6] : 125
= [504 - (25 . 8 + 70) : 27 + 6] : 125
= [504 - (200 + 70) : 27 + 6] :125
= [504 - 270 : 27 + 6] : 125
= [504 - 10 + 6] : 125
= [494 + 6] : 125
= 500 : 125
= 4
c) 27 . 23 + 4 . 32 - 5 . 120
= 27 . 8 + 4 . 9 - 5 . 1
= 216 + 36 - 5
= 252 - 5
= 247
d) 316 - (5. 2 . 22 + 24) : 23 - 3 . 23
= 316 - (5 . 2 . 4 + 16) : 8 - 3 . 8
= 316 - (40 + 16) : 8 - 3 . 8
= 316 - 56 : 8 - 3 . 8
= 316 - 7 - 3 . 8
= 316 - 7 - 24
= 309 - 24
= 285
a/ \(\left(-19\right)+5+\left(-8\right)+19+\left(-3\right).\left(-2\right)^3\)
\(\left(-19\right)+5+\left(-8\right)+19+\left(-3\right).\left(-8\right)\)
\(\left(-19\right)+5+\left(-8\right)+19+24\)
\(\left(-14\right)+11+24\)
\(\left(-3\right)+24=21\)
b/ \(\left(-5\right)^3-\left(3^3+4\right).\left(-2\right)+\left(3-27\right):4\)
\(\left(-125\right)-\left(27+4\right).\left(-2\right)+\left(3-27\right):4\)
\(\left(-125\right)-\left(31\right).\left(-2\right)+\left(-24\right):\text{4}\)
\(\left(-125\right)-\left(-62\right)+\left(-6\right)\)
\(\left(-63\right)+\left(-6\right)=-69\)
c/ \(\left[504-\left(5^2.8+70\right):3^2+6\right]:\left(-20\right)\)
\(\left[504-\left(25.8+70\right):9+6\right]:\left(-20\right)\)
\(\left[504-270:9+6\right]:\left(-20\right)\)
\(\left[504-30+6\right]:\left(-20\right)\)
\(480:\left(-20\right)=-24\)
d/ \(\left(-7\right)-\left[\left(-19\right)+21\right].\left(-3\right)-\left[32+\left(-7\right)\right]\)
\(\left(-7\right)-2.\left(-3\right)-25\)
\(\left(-7\right)-\left(-6\right)-25\)
\(\left(-1\right)-25=-26\)
\(\)
17 *75 +25.17-34.25
=17.75+25.17-17.2.25
=17.75+25.17-17.50
=17(75+25-50)
=17.50
=850
17.75+25-34.25
17.(75+25)-34.25
17.100-17.2.25
17.100-17.50
17.(100-50)
17.50
850
[545 - (45 + 4 x 25)] : 50 - 200 : 250 + 215 : 213
= [545 - (45 + 100)] : 50 - 200 : 250 + 22
= (545 - 4500) : 50 - 200 : 254
= (-3955) : 50 + 200 : 254
= [(-3955) + 200] : (50 + 254)
= (-3755) : 304
= bạn tự tính nha
[504 - (25 x 8 + 70)] : 9 - 15 + 190
= [504 - (200 + 70)] : 9 - 15 + 0
= (504 - 270) : 9 - 15
= 234 : 9 - 15
= 26 - 15
= 9
5 x {26 - [3 x 5 + 2 x 5 + 15] : 15}
= 5 x {26 - [(3 + 2) x 5) + 15] : 15}
= 5 x {26 - [5 x 5 + 15] : 15}
= 5 x [26 - (25 + 15) : 15]
= 5 x (26 + 25 - 15 : 15)
= 5 x (51 - 1)
= 5 x 50 = 250
d) [1104 - (25 x 8 + 40)] : 9 + 316 : 312
= [1104 - (200 + 40)] : 9 + 34
= (1104 - 240) : 9 + 81
= 864 : 9 + 81
= 96 + 81
= 177
Học tốt!!!
\(\left[504-\left(5^2.8+70\right):3^3+6\right]:25\)
\(\left[504-\left(25.8+70\right):27+6\right]:25\)
\(\left[504-\left(200+70\right):27+6\right]:25\)
\(\left[504-270:27+6\right]:25\)
\(\left[504-10+6\right]:25\)
\(\left[494+6\right]:25\)
\(500:25\)
= 20
\(\left[504-(5^2\cdot8+70):3^3+6\right]:25\)
\(=\left[504-(25\cdot8+70):27+6\right]:25\)
\(=\left[504-(200+70):27+6\right]:25\)
\(=\left[504-270:27+6\right]:25\)
\(=\left[504-10+6\right]:25\)
\(=\left[494+6\right]:25\)
\(=500:25=20\)
\(\text{Ko chắc }:)\)
22 x 43 - 625 : {[504 - (52 x 8 + 70) : 32 + 6] : 20 + 20230}
= 4 x 64 - 625 : {[504 - (25 x 8 + 70) : 9 + 6] : 20 + 1}
= 256 - 625 : {[504 - (200 + 70) : 9 + 6] : 20 + 1}
= 256 - 625 : {[504 - 270 : 9 + 6] : 20 + 1}
= 256 - 625 : {[504 - 30 + 6] : 20 + 1}
= 256 - 625 : {[474 + 6] : 20 + 1]
= 256 - 625 : {480 : 20 + 1]
= 256 - 625 : {24 + 1}
= 256 - 625 : 25
= 256 - 41
= 215
22 x 43 - 625 : {[504 - (52 x 8 + 70) : 32 + 6] : 20 + 20230}
= 4 x 64 - 625 : {[504 - (25 x 8 + 70) : 9 + 6] : 20 + 1}
= 256 - 625 : {[504 - (200 + 70) : 9 + 6] : 20 + 1}
= 256 - 625 : {[504 - 270 : 9 + 6] : 20 + 1}
= 256 - 625 : {[504 - 30 + 6] : 20 + 1}
= 256 - 625 : {[474 + 6] : 20 + 1]
= 256 - 625 : {480 : 20 + 1]
= 256 - 625 : {24 + 1}
= 256 - 625 : 25
= 256 - 41
= 215