a) 21/17 x 22/17 x 68/63
= 21 x 11 x 2 x 17 x 4 / 11 x 17 x 21 x 3
= 8/3
b) 5/14 x 7/13 x 26/25
= 5 x 7 x 13 x 2 / 7 x 2 x 13 x 5 x 5
= 1/5
Tinh bang cach thuan tien nhat:
a)21/11x22/17x68/63
b)5/14x7/13x26/25
tinh thuan tien nhat: 21/11x22/14x68/63
tinh bang cach thuan tien nhat
2,9*5+2,9:0,25+5,8-29*0,1
Tinh bang cach thuan tien nhat:
40,16 x 2,5 : 5
Tinh bang cach thuan tien nhat 4/15+8/13+11/5+5/13
Tinh bang cach thuan tien 9/5:17/15+8/5:17/15 bang bao nhieu
Tinh bang cach thuan tien:
5/9: 4/7+ 13/9 *7/4
tinh bang cach thuan tien nhat phep tinh 1212/1515
tinh bang cach thuan tien nhat: 2,5x12,5x8x0,4
