( -4/3 x 7/8 + 5/8 x 4/3 ) : ( -3)
= ( -7/6 + 5/6 ) : ( -3)
= -1/3 : -3
= 1/9
( -4/3 x 7/8 + 5/8 x 4/3 ) : ( -3)
= ( -7/6 + 5/6 ) : ( -3)
= -1/3 : -3
= 1/9
A, 2/3+4/5+1/2 B, 7/8.4/9+7/8.5/9-(-1/8) C, 1/2+4/5-3/4
1, Tính :
a, A = 1.(-1)+3.(-1)^2+5.(-1)^3.7+(-1)^4+9.(-1)^5
b, 1-2-3+4+5-6-7+8+...+61-62-63-64
1, Tính :
a, A = 1.(-1)+3.(-1)^2+5.(-1)^3.7+(-1)^4+9.(-1)^5
b, 1-2-3+4+5-6-7+8+...+61-62-63-64
Bài 1:
a, x+1/2=3/8.4/5
b, 5/16:x-1/4=5/8
c,-1/4.x+3/7.x=2
d, 22/9-(x+1/2)^2=7/3
e, \(\frac{1}{4}-x+5\frac{1}{8}=6\frac{1}{8}\)
Giúp mik với, đang gấp lắm!!!!!!!!!!!!!!!!!!!!!!!!!!!!
Tính tổng:a)3+3/5+3/25+3/125+3/625
b)M=4/3.7+4/7.11+4/11.15+...+8/95.99
c)N=1/2+1/6+1/12+1/20+...+1/90
Tính:
a)\(2^3.7+3^2.6=\)
b)\(7^3-6^3-5^3=\)
c)\(6^4-2^5.3^3=\)
d)\(\left(7^9-9^7\right)\left(6^8-8^6\right)\left(3^5-5^3\right)\left(2^4-4^2\right)=\)
Tính;
(6^2+7^2+8^2+9^2+10^2)-(1^2+2^2+3^2+4^2+5^2)
(125^3.7^5-175^5:5):2001^2002
16.64.8^2:(4^3.2^5.16)
giúp mình bài này với!
(-6-2).(-6+2)
(7.3-3):(-6)
(-5+9).(-4)
72:(-6.2+4)
-3.7-4.(-5)+1
18-10:(+2)-7
15:(-5).(-3)-8
(6.8-10:5)+3.(-7)
giúp mình với !gấp lắm
bài 1, tính
a, [-6-2].[-6+2]
b, [7.3-3]:[-6]
c, [-5+9] .[-4]
d, 72:[-6.2+4]
e, -3.7-4.[-5]+1
f,18-10:[+2]-7
g, 15:[-5].[-3]-8
h, [6.8-10:5]+3.[-7]
