Tính nhanh:\(\frac{1\times2\times3+2\times4\times6+3\times6\times9+4\times8\times12+5\times10\times15}{1\times3\times5+2\times6\times10+3\times9\times15+4\times12\times20+5\times15\times25}-\frac{1+2+3+2+4+6+3+6+9+4+8+12+5+10+15}{1+3+5+2+6+10+3+9+15+4+12+20+5+15+25}\)

Bài 2: Tính

a) \(\dfrac{30\times25\times7\times8}{75\times8\times12\times14}\)

b)\(\dfrac{8\times3\times4}{16\times3}\)

c)\(\dfrac{4\times5\times6}{3\times10\times8}\)

(Các bạn tách các số ra rồi gạch, gạch xong thì nhân lại và ra kết quả) Thanks

Tính nhanh : \(\frac{1}{8}\div12,5\%+\left(\frac{1\times2\times3+6\times4\times2}{5\times3\times1+5\times15\times25}+\frac{1}{2}\div50\%\right)-\left(\frac{1}{16}\div6,25\%+\frac{3+2+1+2+4+6}{1+3+5+25+15+5}\right)-\frac{1}{4}\div25\%\)

1.Tính giá trị tuyệt đối:(hẹp me)

a)\(\frac{72^3\times54^2}{108^4}\)

b)\(\frac{3^{10}\times11+3^{10}\times5}{3^9\times2^4}\)

c)\(\left(1:\frac{1}{7}\right)^2[\left(2^2\right)^3:2^5]\times\frac{1}{49}\)

d)\(\frac{4^6\times3^5-2^{12}\times3^6}{2^{12}\times9^3+8^4\times3^5}\)

1.Tính giá trị tuyệt đối:(hẹp me)

a)\(\frac{72^3\times54^2}{108^4}\)

b)\(\frac{3^{10}\times11+3^{10}\times5}{3^9\times2^4}\)

c)\(\left(1:\frac{1}{7}\right)^2[\left(2^2\right)^3:2^5]\times\frac{1}{49}\)

d)\(\frac{4^6\times3^5-2^{12}\times3^6}{2^{12}\times9^3+8^4\times3^5}\)

tính :\(\frac{1}{1\times2\times3}+\frac{1}{2\times3\times4}+\frac{1}{3\times4\times5}+\frac{1}{4\times5\times6}+\frac{1}{5\times6\times7}+\frac{1}{6\times7\times8}+\frac{1}{7\times8\times9}+\frac{1}{8\times9\times10}\)

a]   \(5\times5\times3\times15\times25\times9=\)
b]   \(9\times21\times7\times3\times49=\)
c]    \(8\times4\times10\times25=\)