8/8+8/8-3/3*1/1=1+1-1*1=1+1-1=2-1=1
8/8+8/8-3/3*1/1=1+1-1*1=1+1-1=2-1=1
1/8*2+1/8*3+1/8*4+1/8*5+1/8*6+1/8*7+1/8*8+1/8*9. Tính nhanh
1) 1 3/4-1 3/8:(3/8+9/20)
2) 4 7/8-3 11/12:( 5/6+1 1/8)
3) 8 2/3 : ( 6 2/3-4 1/2)-2 37/51
a) A=40+3/8+7/8+5/8^3+.....+32/8^5
B=24/8^2+40+5/8^2+...............+40/8^4+5/8^4
b) A=1+1/2+1/3+...................+1/64
B=4
Tính
a) (-1/5 + 5/8) + -3/8
b) -5/21 - (16/21 - 1)
c)3/7 . -5/11 + 3/7 . 6/11
d) 4/3 : -3/8 + 8/-3 . -7/3
e) 3 2/5 + -5/8 - ( 0,4 + 3/8)
1) 1/2x + 3/4x = 4/5
2) 3/7 . 5/8 - 3/8 . 13/8 + 1/7
1*2*3*4...*9-1*2*3*4*...8-1*2*3*4*...*8*8
tính A = 1*2*3*...*9-1*2*3*...*8-1*2*3*4*...*8*8
Bài 1 So sánh
A= 40+ 3/8 + 7/8^2 + 5/8^3 + 32/8^5
B= 24/8^2 + 40 + 5/8^2 + 40/8^4 + 5/8^4
Bài 2 So sánh
a, 1.3.5.7...99 và 51/2 . 52/2 .... 100/2
b, A= 1+1/2 + 1/3 + 1/4 + ...... + 1/64 và 4
Tính
A=1×2×3×...×9-1×2×3×...×8-1×2×3×...8×8