Zad.1
oblicz
1 1/3 * 2/5=
2 1/2 * 3/4=
2/7 * 5 3/4=
2 4/5 * 3 2/3=
1⅔×2½=
2¼×3⅖=
zad.2
oblicz skracając, jeśli to możliwe
¾×⅚=
8/5× 7/12=
4/9× 7/10=
⅚× 9/10=
4/7 × 21/24=
⅜× 14/15=
1⅓×2¼=
2½×1⅕=
3⅕×1⅚=

2

Odpowiedzi

2009-12-16T17:06:20+01:00
4/3 x 2/5 = 8/15
2 1/2 * 3/4= 5/2 x 3/4 = 1 7/8
2/7 * 5 3/4= 2/7 x 23/4 = 1 9/14
2 4/5 * 3 2/3= 14/5 x 11/3 = 10 4/15
1⅔×2½= 5/3 x 5/2 = 4 1/6
2¼×3⅖= 9/4 x 17/5 = 7 13/20

¾×⅚= 5/8
8/5× 7/12= 14/15
4/9× 7/10= 14/45
⅚× 9/10= 3/4
4/7 × 21/24= 3/6 = 1/2
⅜× 14/15= 7/20
1⅓×2¼= 4/3 x 9/4 = 3
2½×1⅕= 5/2 x 6/5 = 3
3⅕×1⅚= 16/5 x 11/6 = 88/15 = 5 13/15



2009-12-16T18:22:25+01:00
1.
1 1/3 * 2/5=4/3*2/5=8/15
2 1/2 * 3/4=3/2*3/4=9/8=1 1/8
2/7 * 5 3/4=2/7*23/4=46/28=23/14=1 9/14
2 4/5 * 3 2/3=14/5*11/9=154/45=3 19/45
1⅔×2½= 5/3*3/2=5/2=2 1/2
2¼×3⅖=9/4*17/5=153/20=7 13/20

2.
¾×⅚=1/4*5/2=5/8
8/5× 7/12=2/5*7/3=14/15
4/9× 7/10=2/9*7/5=14/45
⅚× 9/10=1/2*3/2=3/4
4/7 × 21/24=1/1*3/6=3/6=1/2
⅜× 14/15=1/4*7/5=7/20
1⅓×2¼=4/3*9/4=1/1*3/1=3/1=3
2½×1⅕=5/2*6/5=1/1*3/1=3/1=3
3⅕×1⅚=16/5*11/6=8/5*11/3=88/15=5 13/15