[504-(5^2*2^3+70) / 3^2-18
tính nhanh nếu có thể:
[504-(52. 23+70)]:32-18
1) 168 - ( 18 - 2x ) x 12 = 120
2) [ 75 + ( 16 - x ) ] x 2 = 156
3) 124 - 24 x ( 3x - 16 ) = 76
4) [ ( 10 - x ) x 2 + 5 ] : 3 - 2 = 3
5) [ 80 + ( 62 - x ) ] : 17 - 7 = 1
6) 65 - ( 5x - 70 ) : 2 = 50
7) 504 : 9 136 - 2x ) + 4 = 32
8) ( 13x - 28 ) x 15 - 5 x 23 = 320
Mình cần gấp ạ !!!
17.75+25.17-34.25=
[504-(52.8+70):33+6]:125 =
194.12+6.437.2+3.369.4 =
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
thực hiện phép tính
[504-(5\(^2\).8+70):3\(^3\) +6] :125
[ 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
= 500 : 125
= 4
[ 504 - ( 5 2 . 8 + 70 ) : 3 3 + 6 ] : 125
= [ 504 - 270 : 27 + 6 ] : 125
= [ 504 - 10 + 6 ] : 125
= [ 494 + 6 ] : 125
= 500 : 125
= 4
Thực hiện phép tính bằng cách hợp lý nếu có thể
[504-(52.8+70) :33+6]:25
\(\left[504-\left(5^2.8+70\right):3^3+6\right]:25\)
\(\left[504-\left(25.8+70\right):27+6\right]:25\)
\(\left[504-\left(200+70\right):27+6\right]:25\)
\(\left[504-270:27+6\right]:25\)
\(\left[504-10+6\right]:25\)
\(\left[494+6\right]:25\)
\(500:25\)
= 20
\(\left[504-(5^2\cdot8+70):3^3+6\right]:25\)
\(=\left[504-(25\cdot8+70):27+6\right]:25\)
\(=\left[504-(200+70):27+6\right]:25\)
\(=\left[504-270:27+6\right]:25\)
\(=\left[504-10+6\right]:25\)
\(=\left[494+6\right]:25\)
\(=500:25=20\)
\(\text{Ko chắc }:)\)
mọi người làm bài hộ mình nha
a / (-19)+5+(-8) +19+(-3).(-2)3
b/ (-5)3-(33+4).(-2)+(3-27):4
c/ [504-(52.8+70):32+6 ]:(-20)
d /(-7)-[(-19)+21].(-3) -[32+(-7)]
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/ \(\left(-7\right)-\left[\left(-19\right)+21\right].\left(-3\right)-\left[32+\left(-7\right)\right]\)
\(\left(-7\right)-2.\left(-3\right)-25\)
\(\left(-7\right)-\left(-6\right)-25\)
\(\left(-1\right)-25=-26\)
\(\)
điền dấu >, < , =
2/3 .... 3/2 10/18 ...... 11/18 5/8 ........ 10/16 1 .......... 70/71
Bài 3 : tính
a) 220 - [ 32.33 - (12-70)2 ]
b) [504 - 52.8 +70) :33 +6] :125
c) 27.23 + 4.32 - 5.120
d) 316 - (5.2.22 + 24) :23- 3.23
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
1) 2020-2018 : ( 49 + 30x 32 )
2) 316-(52 x 22 + 24) : 23 - 3 x 23
3) 3280 - ( 32 x 73 - 23 xx 49 )
4) [ 504 - ( 52 x 8 + 70 ) : 33 + 6] : 125
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