A= 212.35-46.92 / (22.3)6+84.35 - 510.73-255.492 / (125.7)3.59.143
Tuyển Cộng tác viên Hoc24 nhiệm kì 26 tại đây: https://forms.gle/dK3zGK3LHFrgvTkJ6
H24
Những câu hỏi liên quan
H24
29 tháng 6 2021 lúc 21:33
A = 212.35-46.92 phần 126+312-35
- 510.73-625.74 phần (53.7)3+59.143
(Lưu ý : dấu - là trừ phân số này cho phân số khác )
bn nào làm đúng mk tim cho
Tính nhanh:
a)34.18+3.6.23+9.43.2
b)54.112+88.54+46.92+118.46
a) 34.18+23.18+43.18
18. (34+23+43)
18.100=1800
b)54.(112+88)+(92+118).46
54.200+210.46
10800+9660=20460
Đúng 0
Bình luận (0)
mình trả lời cho câu hỏi làm ơn trả văn lời nha.
Đặt A = 1 + 2 + 22 + ... + 2100
=> 2A = 2 + 22 + ... + 2101
=> 2A - A = 2 + 22 + ... + 2101 - (1 + 2 + 22 + ... + 2100)
=> A = 2101-1
Đúng 0
Bình luận (0)
Tính nhanh: (48.6×2.4-24.3×4.8)×20.15×46.92
LS
22 tháng 3 2022 lúc 21:43
Thực hiện phép tính:
A= 5.(22.32)9.(22)6-2.(22.3)14.34 / 5.228. 318 - 7.229.318
\(A=\dfrac{5.\left(2^2.3^2\right)^9.\left(2^2\right)^6-2.\left(2^2.3\right)^{14}.3^4}{5.2^{28}.3^{18}-7.2^{29}.3^{18}}\)
\(=\dfrac{5.2^{18}.3^{18}.2^{12}-2.2^{28}.3^{14}.3^4}{5.2^{28}.3^{18}-7.2^{29}.3^{18}}\)
\(=\dfrac{5.2^{20}.3^{18}-2^{29}.3^{18}}{2^{28}.3^{18}\left(5-7.2\right)}\)
\(=\dfrac{2^{29}.3^{18}\left(5.2-1\right)}{2^{28}.3^{18}\left(5-14\right)}=\dfrac{2.9}{-9}=-2\)
Đúng 3
Bình luận (0)
Xem thêm câu trả lời
A=2^12.3^5-4^6.9^2\(2^2.3)^6+8^4.3^5 - 5^10.7^3-25^5.49^2\(125.7)^3+5^9.14^3
Rút gọn phân số : a) (-14).15\21.(-10) b) (-7).12/(-16).(-14) c) (-11).(-5)/15.22 d) (-10).(-18)/(-6).25.7 e) 5.7-7.9/7.2+6.7 f) 11.9-22.3/33.2
`a) ((-14).15)/(21.(-10))`
`=(-7.3.5.3)/(7.3.(-2).5)`
`=3/2`
`b) ((-7).12)/((-16).(-14))`
`=(-7.3.2.2)/(-2.2.2.(-7).2)`
`=(-3)/4`
`c) ((-11).(-5))/(15.22) `
`=(-11.(-5))/(3.5.11.2)`
`=1/6`
`d) ((-10).(-18))/((-6).25.7)`
`=(-5.2.-2.3.3)/(-2.3.5.5.7)`
`=6/35`
`e) (5.7-7.9)/(7.2+6.7)`
`=(7.(5-9))/(7.(2+6))`
`=-4/8`
`=-1/2`
`f) (11.9-22.3)/(33.2)`
`=(33.(3-2))/(33.2)`
`=1/2`
Đúng 4
Bình luận (9)
a)(−14).1521.(−10)�)(-14).1521.(-10)
=−7.3.5.37.3.(−2).5=-7.3.5.37.3.(-2).5
=32=32
b)(−7).12(−16).(−14)�)(-7).12(-16).(-14)
=−7.3.2.2−2.2.2.(−7).2=-7.3.2.2-2.2.2.(-7).2
=−34=-34
c)(−11).(−5)15.22�)(-11).(-5)15.22
=−11.(−5)3.5.11.2=-11.(-5)3.5.11.2
=16=16
d)(−10).(−18)(−6).25.7�)(-10).(-18)(-6).25.7
=−5.2.−2.3.3−2.3.5.5.7=-5.2.-2.3.3-2.3.5.5.7
=635=635
e)5.7−7.97.2+6.7�)5.7-7.97.2+6.7
=7.(5−9)7.(2+6)=7.(5-9)7.(2+6)
=−48=-48
=−12=-12
f)11.9−22.333.2�)11.9-22.333.2
=33.(3−2)33.2=33.(3-2)33.2
=12
Đúng 1
Bình luận (0)
Bài 1:Tính
a)6^2^1;3^2^3;(2016^2578)^0
b)11.3^22.3^7-9^15/(2.3^14)^2
bài 2:tìm x
x^10=x
\(\hept{\begin{cases}\\\end{cases}\hept{\begin{cases}\\\\\end{cases}}\orbr{\begin{cases}\\\end{cases}}^{ }^2_{ }\widebat{ }\varnothing\alpha}\)ok
chua
(2^12.3^5-4^6.9^2)/((2^3.3)^6)-5^10.7^3-25^5.49^2/(125.7)^3+5^9.14^3
thực hiện phép tính
\(A=\dfrac{2^{12}.3^5-4^6.9^2}{\left(2^2.3\right)^6+8^4.3^5}-\dfrac{5^{10}.7^3-25^5.49^2}{\left(125.7\right)^3+5^9.14^3}\)
\(A=\dfrac{2^{12}.3^5-4^6.9^2}{\left(2^2.3\right)^6+8^4.3^5}-\dfrac{5^{10}.7^3-25^5.49^2}{\left(125.7\right)^3+5^9.14^3}\)
\(=\dfrac{2^{12}.3^5-2^{12}.3^4}{2^{12}.3^6+2^{12}.3^5}-\dfrac{5^{10}.7^3-5^{10}.7^4}{5^9.7^3+5^9.2^3.7^3}\)
\(=\dfrac{2^{12}.3^4.\left(3-1\right)}{2^{12}.3^5.\left(3+1\right)}-\dfrac{5^{10}.7^3.\left(1-7\right)}{5^9.7^3.\left(1+2^3\right)}\)
\(=\dfrac{2^{12}.3^4.2}{2^{12}.3^5.4}-\dfrac{5^{10}.7^3.\left(-6\right)}{5^9.7^3.9}\)
\(=\dfrac{1}{6}-\dfrac{-10}{3}\)
\(=\dfrac{7}{2}\)
Đúng 9
Bình luận (1)
\(A=\frac{2^{12}.3^5-4^6.9^2}{\left(2^2.3\right)^6+8^4.3^5}-\frac{5^{10}.7^3-25^5.49^2}{(125.7)^3+5^9.14^3}\)
\(=\frac{2^{12}.2^5-2^{12}.3^4}{2^{12}.3^6+2^{12}.3^5}-\frac{5^{10}.7^3-5^{10}.7^4}{5^9.7^3+5^9.2^3.7^3}\)
\(=\frac{2^{12}.3^4.\left(3-1\right)}{2^{12}.3^5.\left(3+1\right)}-\frac{5^{10}.7^3.\left(1-7\right)}{5^9.7^3.\left(1+2^3\right)}\)
\(=\frac{2^{12}.3^4.2}{2^{12}.3^5.4}-\frac{5^{10}.7^3.\left(-6\right)}{5^9.7^3.9}\)
\(=\frac{1}{6}-\frac{-10}{3}\)
\(\frac{1}{6}-\frac{-20}{6}=\frac{7}{2}\)
Đúng 1
Bình luận (0)