Question

Oblicz:

a) 3/4 + 0,8 =

1,2 + 2/3 =

4,8 + 0,75 + 7/8 =

b) 24/25 - 0,35 =

4,5 - 2 2/5 =

12,125 - 7 5/8 =

c) 1 2/5 * 3,5 =

3 1/3 * 1,125 =

4,8 * 1 1/3 =

d) 3,5 : 1 2/5 =

4 1/4 : 2,5 =

2,2 : 1 5/6 =

Answer 1

a) 3/4 + 0,8 = 0,75 + 0,8 = 1,55

1,2 + 2/3 = 1  2/10 + 2/3 = 12/10 + 2/3 = 36/30 + 20/30 = 56/30 = 1  26/30

4,8 + 0,75 + 7/8 =4,8 + 0,75 + 0,875 = 6,425

b) 24/25 - 0,35 = 96/100 - 35/100 = 61/100 = 0,61

4,5 - 2 2/5 = 4,5 - 12/5 = 45/10 - 12/5 = 45/10 - 24/10 = 21/10 =  2,1

12,125 - 7 5/8 = 12,125 - 61/8 = 12,125 - 7,625 = 4,5

c) 1 2/5  *  3,5 = 1  2/5 * 3  5/10 = 7/5 * 35/10 = 49/10 = 4,9

3 1/3 * 1,125 = 10/3 * 1 125/1000 = 10/3 * 1125/1000 = 1125/300 = 3,75

4,8 * 1 1/3 = 4  8/10 * 4/3 = 48/10 * 4/3 = 32/5 = 6,4

d) 3,5 : 1 2/5 = 3  5/10 : 7/5 = 35/10 * 5/7 = 5/2 = 2,5

4 1/4 : 2,5 = 17/4 : 2  5/10 = 17/4 : 25/10 = 17/4 *10/25 = 17/10 = 1,7

2,2 : 1 5/6 = 2  2/10 : 11/6 = 22/10 * 6/11 = 6/5 = 1  1/5 = 1,2