a)  − 7 .3 + 4. − 6 − 5 .3 + 2.3 = − 45 = 9 = 6

b)  3.6 + 2.9.5 − 18. − 4 7. − 7 + 12. − 7 + 7 = 18. 1 + 5 + 4 − 7 . 7 + 12 − 1 = 18.10 − 7.18 = − 10 7

110,5:34=3,25

905,2:7,3=124

483:35=13,8

91,08:3,6=25,3

3:6,25=0,48

=145.35

Cho  hỏi dấu "." là dấu nhân hay dấu phẩy vậy?

\(14,4\cdot5,5+14.7\cdot3,5+14.7=145,35\)

a: \(=\dfrac{2^5\cdot3^5\cdot2^{12}\cdot2^{16}\cdot5^{16}}{2^{30}\cdot3^{10}\cdot5^{16}}=\dfrac{2^{33}\cdot3^5}{2^{30}\cdot3^{10}}=\dfrac{8}{243}\)

c: \(=\dfrac{4^7\cdot3^{12}\cdot5^4+3^{12}\cdot5^6\cdot4^7}{2^{14}\cdot3^{14}\cdot5^4+2^{14}\cdot3^{14}\cdot5^6}\)

\(=\dfrac{2^{14}\cdot3^{12}\cdot5^4\left(1+25\right)}{2^{14}\cdot3^{14}\cdot5^4\left(1+25\right)}=\dfrac{1}{9}\)

=14,7+1,323-10,8

=16,023-10,8

=5,223

=14.7 + 1.323 - 10.8

 = 16.023 - 10.8

=5.223

Vật nặng có khối lượng 50kg nghĩa là trọng lượng bằng 500N.

ko thể viết câu hỏi à?

\(14.7^{2021}=35.7^{2021}-3.49^x\)

\(\Leftrightarrow2.7^{2022}=5.7^{2022}-3.7^{2x}\)

\(\Leftrightarrow3.7^{2x}=3.7^{2022}\) \(\Leftrightarrow7^{2x}=7^{2022}\)

\(\Leftrightarrow2x=2022\Leftrightarrow x=1011\) (TM \(x\in Z\))

Vậy \(x=1011\)

\(\frac{29.5}{2.35}=\frac{29.5}{2.5.7}=\frac{29}{2.7}=\frac{29}{14}\)

bằng 12,5531

bạn nhé

\(29.3+29.5+\left(-29\right).2=29.\left(3+5+-2\right)=29.6=174\)

\(29.3+29.5+\left(-29\right).2\\ =29.3+29.5+29.\left(-2\right)\\ =29.\left(3+5-2\right)\\ =29.6\\ =174\)

\(29.3+29.5+\left(-29\right).2\)

\(=29\left(3+5-2\right)\)

\(=29.6\)

\(=174\)