Tính 10^2;10^3;10^4;10^5;10^6.
giup minh ne 10 phep tinh nhan so thap phan, phan thap phan co 2 chu so
10 phep tinh phan thap phan co 3 chu so
10 phep tinh so thap cong so thap phan
10 phep tinh so thap phan tru so thap phan
3/5 + 1/2 + 3/10 =
tinh ca phep tinh
\(\dfrac{3}{5}+\dfrac{1}{2}+\dfrac{3}{10}=\dfrac{6}{10}+\dfrac{5}{10}+\dfrac{3}{10}=\dfrac{14}{10}=\dfrac{7}{5}\)
\(\dfrac{3}{5}+\dfrac{1}{2}+\dfrac{3}{10}\\ =\dfrac{6}{10}+\dfrac{5}{10}+\dfrac{3}{10}\\ =\dfrac{14}{10}\\ =\dfrac{7}{5}\)
tinh 1/10+2/10 +3/10...9/10+10/10
1/10 + 2/10 + 3/10...9/10 + 10/10 = 55
Chắc lun.
Học tốt
\(\frac{1}{10}+\frac{2}{10}+\frac{3}{10}+...+\frac{9}{10}+\frac{10}{10}\)
\(=\frac{1+2+3+4+5+6+7+8+9+10}{10}\)
\(=\frac{55}{10}=\frac{11}{2}\)
1/10 + 2/10 + 3/10 + 4/10 + 5/10 + 6/10 + 7/10 + 8/10 + 9/10 tinh nhanh
\(\dfrac{1}{10}+\dfrac{2}{10}+\dfrac{3}{10}+\dfrac{4}{10}+\dfrac{5}{10}+\) \(\dfrac{6}{10}+\dfrac{7}{10}+\dfrac{8}{10}+\dfrac{9}{10}\)
\(=\dfrac{1+2+3+4+5+6+7+8+9}{10}\)
\(=\dfrac{45}{10}=\dfrac{9}{2}\)
1 + 2 + 3 + 4 + 5 + 6 + 7 + 8 + 9/10 = 44/10 = 22/5
A) tinh 10^2 ; 10^3 ;10^4 ; 10^5 ; 10^6
b
\(10^2=100\)
\(10^3=1000\)
\(10^4=10000\)
\(10^5=100000\)
\(10^6=1000000\)
\(10^2=100;10^3=1000;10^4=10000;10^5=100000;10^6=1000000\)
tinh 10^2; 10^3;10^4;10^5;10^6
10^2=100
10^3=1000
cứ thế thêm 1 số 0 vào là đc thôi
102=100
103=1000
104=10000
105=100000
106=1000000
\(10^2=10.10=100\)
\(10^3=10.10.10=1000\)
\(10^4=10.10.10.10=10000\)
\(10^5=10.10.10.10.10=100000\)
\(10^6=10.10.10.10.10.10=1000000\)
Tinh:
A= (10^3-1}^1.(10^3-2)^2.(10^3-3)^3.........(10^3-100)^100
tinh giá trị biểu thức A=[(2^22*13+13+2*12*65)/(2^10*10^4)]+[(3^10*11+3^10*5)/(3^)9*2*4)]
Tinh 2 cach 2^10:2^8
2^10:2^8
Cách 1=2^2
=4
Cách 2 =1024:256
=4
tinh A=(210x13+210x65) /(28x104)
\(A=\frac{2^{10}.13+2^{10}.65}{2^8.104}=\frac{2^{10}.\left(13+65\right)}{2^8.2^3.13}=\frac{2^{10}.78}{2^{11}.13}=\frac{78}{2.13}=\frac{78}{26}=3\)