Ôn tập toán 6
Các câu hỏi tương tự
3/4.8/9.15/16............624/625
Giúp mình nha
a)P=(1-1/2).(1-1/3).(1-1/4).....(1-1/999).(1-1/1000)
b)A=3/4. 8/9.15/16.....2499/2500
c)B=(22/1.3) . (32/2.4) . (42/3.5)...(502/49.51)
\(A=\left(1+\dfrac{1}{3}\right)\left(1+\dfrac{1}{8}\right)\left(1+\dfrac{1}{15}\right)...\left(1+\dfrac{1}{9999}\right)\)
So sánh A với 2
Tính giá trị của biểu thức, tính nhanh nếu có thể:
21) ( 1 + 1/3 ) . ( 1 + 1/8 ) . ( 1 + 1/15 ) . ...... ( 1+ 1/9999)
22) A = \(\frac{38}{25}+\frac{9}{10}-\frac{11}{15}+\frac{13}{21}-\frac{15}{28}+\frac{17}{36}-......+\frac{197}{4851}-\frac{199}{4950}\)
Bài 1: rút gọn
dfrac{16^3.3^{10}+120.6^9}{4^6.3^{12}+6^{11}}
left(dfrac{2}{3}right)^3.left(dfrac{-3}{4}right)^2.left(-1right)^{2013}
left(dfrac{1}{5}right)^{15}.left(dfrac{1}{4}right)^{20}
dfrac{9.5^{20}.27^9-3.9^{15}.25^9}{7.3^{29}.125^6-3.3^9.15^{19}}
dfrac{4^5.9^4-2.6^9}{2^{10}.3^8+6^8.20}
Đọc tiếp
Bài 1: rút gọn
\(\dfrac{16^3.3^{10}+120.6^9}{4^6.3^{12}+6^{11}}\)
\(\left(\dfrac{2}{3}\right)^3.\left(\dfrac{-3}{4}\right)^2.\left(-1\right)^{2013}\)
\(\left(\dfrac{1}{5}\right)^{15}\).\(\left(\dfrac{1}{4}\right)^{20}\)
\(\dfrac{9.5^{20}.27^9-3.9^{15}.25^9}{7.3^{29}.125^6-3.3^9.15^{19}}\)
\(\dfrac{4^5.9^4-2.6^9}{2^{10}.3^8+6^8.20}\)
Bài 1:Tính
a, Adfrac{3}{4}cdotdfrac{8}{9}cdotdfrac{15}{16}cdot....cdotdfrac{9999}{10000}
b,Bleft(1-dfrac{1}{21}right)cdotleft(1-dfrac{1}{28}right)cdotleft(1-dfrac{1}{36}right)cdot....cdotleft(1-dfrac{1}{1326}right)
c,Cleft(1+dfrac{1}{1cdot3}right)cdotleft(1+dfrac{1}{2cdot4}right)cdotleft(1+dfrac{1}{3cdot5}right)cdot....cdotleft(1+dfrac{1}{99cdot101}right)
Đọc tiếp
Bài 1:Tính
a, A=\(\dfrac{3}{4}\cdot\dfrac{8}{9}\cdot\dfrac{15}{16}\cdot....\cdot\dfrac{9999}{10000}\)
b,B=\(\left(1-\dfrac{1}{21}\right)\cdot\left(1-\dfrac{1}{28}\right)\cdot\left(1-\dfrac{1}{36}\right)\cdot....\cdot\left(1-\dfrac{1}{1326}\right)\)
c,C=\(\left(1+\dfrac{1}{1\cdot3}\right)\cdot\left(1+\dfrac{1}{2\cdot4}\right)\cdot\left(1+\dfrac{1}{3\cdot5}\right)\cdot....\cdot\left(1+\dfrac{1}{99\cdot101}\right)\)
1 rút gọn
\(\dfrac{9.5^{20}.27^9-3.9^{15}:25^9}{7.3^{29}.125^6-3.3^9.15^{19}}\)
\(\left(\dfrac{1}{2}\right)^{15}.\left(\dfrac{1}{-4}\right)^{^{20}}\)
\(\dfrac{4^5.9^4-2.6^9}{2^{10}.3^8+6^8.20}\)
-5/8=x/16
Y/10=(-4)/8
Bai 8:
1) x/3-1/4=(-5)/6
2) x+3/15=1/3
3) x-12/4=1/2
4) 3/4x=1/2
Thực hiện phép tính
1) 6/7 + 5/8 : 5 - 3/16 . ( -2)mũ 2
2) -1/6 + 2/3 . -3/4 + (-2)mũ 2 / 5 chú ý : / là phần nha
3) 2 3/4 . (-0,4 ) + 1 3/5 . 1,75 + (-7,2 ) : 9/11
4) 1/8 . 15 2/5 + 1 4/5 . 7/8 - 17 1/5 . 1/8