Question

1.Oblicz:

a) 5/8 x 7

9/11 x 10

b) 5 x 2 1/3

7 x 6 4/5

d) 3 2/7 x 9

8 3/8 x 11

2.Oblicz, skracając ułamki:

a) 4 x 3/4

5 x 2/15

b) 5/8 x 7

7/12 x 8

c) 6x 2 3/4

7 x 5 3/14

d) 4 17/15 x 6

2 5/27 x 18

/-Kreska ulamkowa

x-Mnożenie

W liczbach bez ułamku chodzi o liczby naturalne.

Answer 1

1.

a)5/8 *7 = 35/8 = 4 3/4

9/11*10= 90/11= 8 2/11

b)5*2 1/3 = 5 *7/3 = 35/3 = 11 2/3 

7*6 4/5 = 7*34/5 = 238/5 = 47 3/5

c)3 2/7 * 9 = 23/7 * 9 = 207/7 = 29 9/7

8 3/8 *11 = 67/8 *11 = 737/8 = 92 1/8

 

2.

a) 4 * 3/4 = 12/4 = 3

5 * 2/15 = 10/15 = 2/3 

b)5/8 * 7 = 35/8 = 4 3/8 

7/12 * 8 = 56/12 = 4 8/12 = 4 2/3

c)6 * 2 3/4 = 66/4 = 16 2/4  = 16 1/2

7* 5 3/14 = 7 * 73/14 = 511/14 = 36 7/14 = 36 1/2

d) 4 17/15 *6 = 77/15 * 6 = 462/15 = 30 12/15= 30 4/5 

2 5/27 * 18 = 59/27 *18 = 1062/27 = 39 9/27 = 39 1/3

Answer 2

1. a) 5/8*7=35/8=4 3/8      9/11*10=90/11=8 2/11

b)5* 2 1/3= 5*7/3= 35/3=11 2/3        7*6 4/5=7*34/5=238/5=47 2/5

d) 3 2/7*9=23/7*9=207/7=29 4/7       8 3/8*11=67/8*11=737/8=92 1/8

 

2. a) 4*3/4=3                   5*2/15=2/3

b) 5/8*7=35/8=4 3/8                  7/12*8=7/3*2=14/3=4 2/3

c)6*2 3/4=6*11/4=3*11/2=33/2=16 1/2      7*5 3/14=7*73/14=73/2=36 1/2

d)4 17/15*6=5 2/15*6=302/15*6=302/3*2=604/3=201 1/3

   2 5/27*18=59/27*18=59/9*6=354/9=39 3/9=39 1/3