\(\dfrac{25\times2}{3\times2}-\dfrac{5}{6}=\dfrac{50}{6}-\dfrac{5}{6}=\dfrac{45}{6}\) = 15/2
\(\dfrac{25\times2}{3\times2}-\dfrac{5}{6}=\dfrac{50}{6}-\dfrac{5}{6}=\dfrac{45}{6}\) = 15/2
tính nhanh:
a) 1/2*2/3 ; 5/6*6/7 ; 10/15*15/20 ;24/25*25/36
b)1/2*2/3*3/4*4/5*5/6*6/7*7/8*8/9*9/10
1/3+7/5=? 3/15+2/5=? 4/6+18/27=? 15/25+6/21=?
tính bằng cách thuận tiện nhất:
( 2/3 x 4/5) x 5/6 (4/5 + 5/4) x 3/4 27/12 + 17/6 - 25/36 - 15/6
Tính nhanh
a. 5/11 + 1/4 + 2/5 + 6/11 + 3/4 + 6/25 + 9/25
b. 19/4 + 37/100 + 1/8 + 1/2 + 163/100 + 3/8
câu 6 : tính a) 3/5 + 1/3 b) 17/20 - 4/5 c) 25/35 x 4/5 d) 7/15 : 6/7
tính
15×3/5
4/2×1/2
6/25×5/8
15:1/3
35:1/5
4/5:1/2
6/25:5/8
tìm x biết:
a. 12+x \ 42 = 5/6
b. 25-x \ 40 = 3/8
c. 13+x \ 20 = 3/4
d. 23-x/25 = 4/5
Tính
25/7 - 2 + 3/2
4/5 x 10/3 : 8
7/3 + 2/5 : 1/6
1 / 5 giờ = ............phút
5 / 6 +19 / 25 +2 / 12 + 11 / 16 + 6 / 25 + 5 / 16
3 / 4 < x / 8 < 1
ghi đầy đủ nhé mình ick cho