37.(-2)2+23.4+4.(-160)
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Đúng ghi Đ sai ghi Đ
1. 6m2 80cm2 × 37%= 25 160
2. 4 2/3 + 2 1/2 - 3 5/12= 2 3/4
1. 6 m2 80 cm2 x 37% = 600080 cm2 x 37/100 = 1110148/5 cm2 ( bn vẫn chữ ghi đơn vị ở chỗ dấu "=" )
2. \(4\frac{2}{3}+2\frac{1}{2}-3\frac{5}{12}=3\frac{3}{4}\)
\(\Rightarrow4\frac{2}{3}+2\frac{1}{2}-3\frac{5}{12}=2\frac{3}{4}\left(S\right)\)
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a) 47 – [(45.24 – 52.12):14] e) 10 – [(82 – 48).5 + (23.1 + 8) -12] : 28b) 2010 – 2000 : [486 – 2(72 – 6)] g) 128 – [68 + 8(37 – 35)2] : 4c) 568 – {5[143 – (4 – 1)2] + 10} : 10 d) 307 – [(180 – 160) : 22 + 9] : 2 h) 205 – [1200 – (42 – 2.3)3] : 40 giúp
Đọc tiếp
a) 47 – [(45.24 – 52.12):14] e) 10 – [(82 – 48).5 + (23.1 + 8) -12] : 28
b) 2010 – 2000 : [486 – 2(72 – 6)] g) 128 – [68 + 8(37 – 35)2] : 4
c) 568 – {5[143 – (4 – 1)2] + 10} : 10
d) 307 – [(180 – 160) : 22 + 9] : 2 h) 205 – [1200 – (42 – 2.3)3] : 40
giúp
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tính
23.4+56-2
like nha
23.4+56-2= 92+56-2
= 148 - 2
= 146
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Xem thêm câu trả lời
a) 37 ( x - 15 ) = 0
b) ( x - 17 ) . 23 = 23
c) ( x - 2 ) ( x -4 ) = 0
d) ( x + 12 ) . 53 = 1060
e) 4 . ( x - 50 ) + 160
f) ( 17 -x ) : 6 = 2
a) 37 (x-15)=0
x-15 =0
x =15
b) (x-17).23=23
x-17 =1
x =1+17
x =18
c) (x-2) (x-4)=0
Th1: x-2=0
x =0+2
x =2
TH2: x-4=0
x =0+4
x =4
Vậy x=2 hoặc x=4
d) (x+12) . 53=1060
x+12 =1060:53
x+12 =20
x =20-12
x =8
e) 4 . (x-50) = 160
x-50 =160:4
x-50 =40
x =40+50
x =90
f) (17-x) : 6=2
17-x =2 . 6
17-x =12
x =17-12
x =5.
Chúc học tốt!
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a) 2345 – 1000 : [19 – 2(21 – 18)2]b) 128 – [68 + 8(37 – 35)2] : 4c) 568 – {5[143 – (4 – 1)2] + 10} : 10d) 107 – {38 + [7.32 – 24 : 6+(9 – 7)3]}:15e) 307 – [(180 – 160) : 22 + 9] : 2f) 205 – [1200 – (42 – 2.3)3] : 40g) 177 :[2.(42 – 9) + 32(15 – 10)]h) [(25 – 22.3) + (32.4 + 16)]: 5i) 125(28 + 72) – 25(32.4 + 64)j) 500 – {5[409 – (23.3 – 21)2] + 103} : 15Viết số mũ giùm mình ạ!
Đọc tiếp
a) 2345 – 1000 : [19 – 2(21 – 18)2] b) 128 – [68 + 8(37 – 35)2] : 4 c) 568 – {5[143 – (4 – 1)2] + 10} : 10 d) 107 – {38 + [7.32 – 24 : 6+(9 – 7)3]}:15 e) 307 – [(180 – 160) : 22 + 9] : 2 f) 205 – [1200 – (42 – 2.3)3] : 40 g) 177 :[2.(42 – 9) + 32(15 – 10)] h) [(25 – 22.3) + (32.4 + 16)]: 5 i) 125(28 + 72) – 25(32.4 + 64) j) 500 – {5[409 – (23.3 – 21)2] + 103} : 15 |
Viết số mũ giùm mình ạ!
a: \(=47-\left[\left(45\cdot16-25\cdot12\right):14\right]\)
\(=47-30=17\)
b: \(=50-\left[6+34\right]\)
=50-40
=10
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29 tháng 12 2023 lúc 22:44
\(\left|x-23.4\right|=23.4\)
Lời giải:
$|x-23.4|=23.4$
$\Rightarrow x-23.4=23.4$ hoặc $x-23.4=-23.4$
$\Rightarrow x=23.4+23.4$ hoặc $x=23.4-23.4$
$\Rightarrow x=184$ hoặc $x=0$
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\(\left|x-23.4\right|=23.4\\ \\ \\\Rightarrow\left|x-92\right|=92\\ \\ \\ \Rightarrow\left[{}\begin{matrix}x-92=92\\-x+92=92\end{matrix}\right. \Rightarrow\left[{}\begin{matrix}x=92+92=19=184\\-x=92-92=0\Rightarrow x=0\end{matrix}\right.\)
Vậy x=184; x=0
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k) 2345 – 1000 : [19 – 2(21 – 18)2 ] l) 128 – [68 + 8(37 – 35)2 ] : 4
m) 568 – {5[143 – (4 – 1)2 ] + 10} : 10
n) 107 – {38 + [7.32 – 24 : 6+(9 – 7)3 ]}:15
o) 307 – [(180 – 160) : 22 + 9] : 2
p) 205 – [1200 – (42 – 2.3)3 ] : 40
q) 177 :[2.(42 – 9) + 32 (15 – 10)]
r) [(25 – 2 2 .3) + (32 .4 + 16)]: 5
s) 125(28 + 72) – 25(32 .4 + 64)
giúp mk
s: \(=125\cdot100-25\cdot192\)
\(=12500-4800\)
=7700
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S=3+3/2+3/2²+......+3/2^9
A=2.9.8+3.12.10+4.15.12+....+98.297.200/23.4+3.4.5+4.5.6+…98.99.100 tinh a²
SAI ĐỀ RỒI BẠN. SỬA 23=2.3
\(\frac{2.9.8+3.12.10+4.15.12+...+98.297.200}{2.3.4+3.4.5+4.5.6+...+98.99.100}\)
\(\frac{1.2.3.\left(2.3.4+3.4.5+4.5.6+...+98.99.100\right)}{\left(2.3.4+3.4.5+4.5.6+...+98.99.10\right)}\)
\(=6\)
VẬYa2=62=36
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- Tính :
a) 160 - ( 2^3 . 5^2 - 6 . 25 )
b) 4 . 5^2 - 32 . 2^4
c) 5871 : [ 928 - ( 247 - 82 ) . 5 ]
d) 777 : 7 + 1331 : 11^3
e) 17 . 85 + 15 . 17 - 120
f) 15 . 141 + 59 . 15
g) 20 - [ 30 - ( 5 - 1 ) ^2 ]
h) 37 - 11 . 3 . ( 24 - 23 ) + 22 . 10
160-(2^3.5^2-6.25)= 160-(8.25-150)=160-50=110
4.5^2-32.2^4= 4.25 - 32.16= 100-512=-412
5871:[928-(247-82).5]=5871:[(928-165).5=5871: ( 763.5)=5871:103=57
777:7+1331:11^3 = 111+1331:1331 = 111+1=112
17.85+15.17-120=17(85+15)-120=17.100-120=1700-120=1580
15.141+59.15=15(141+59)=15.200=3000
20-[30-(5-1)^2]=20-[30-4^2]=20-(30-16)=20-11=9
37-11.3.(24-23)+22.10= 37-33.1+220=37-253=-216
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160-(2^3.5^2-6.25)= 160-(8.25-150)=160-50=110
4.5^2-32.2^4= 4.25 - 32.16= 100-512=-412
5871:[928-(247-82).5]=5871:[(928-165).5=5871: ( 763.5)=5871:103=57
777:7+1331:11^3 = 111+1331:1331 = 111+1=112
17.85+15.17-120=17(85+15)-120=17.100-120=1700-120=1580 15.141+59.15=15(141+59)=15.200=3000
20-[30-(5-1)^2]=20-[30-4^2]=20-(30-16)=20-11=9
37-11.3.(24-23)+22.10= 37-33.1+220=37-253=-216
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