Question

prosze pomuźcie z rospisaniem prosze oto załącznik

Answer 1

a) 0,2 + 3/5 = 2/10 + 6/10 = 8/10 = 4/5

b) 1  1/3 - 0,1 = 4/3 - 1/10 = 40/30 - 3/30 = 37/30 = 1  7/30

c)1,25 * 3/4 = 1  1/4 * 3/4 = 5/4 * 3/4 = 15/16

d)0,7 : 7/9 = 7/10 * 9/7 = 9/10

e)(2,125 + 5/8 )* 0,8 = (2  1/8 + 5/8) *8/10 = 2 6/8 * 8/10 =

     = 2  3/4 * 8/10 = 11/4  * 8/10 = 22/10 = 2  1/5

f)5  1/4 -(0,77 + 1,33) = 5  1/4 -  2,1 = 5,25 - 2,1 = 3,15

g) 3,5 * 1/7 + 1,8 * 2/9 = 35/10 * 1/7 + 18/10 *2/9 = 5/10 + 2/5 =5/10 + 4/10 = 9/10

h)10,6 : (2  1/4 + 2,75) = 106/10:(2  1/4 + 2   3/4) = 106/10 : 5 = 106/10*1/5 = =106/50= 2  6/50  = 2   3/25

i)1,09 + 7,2 : 1  3/5 = 1,09+ 72/10 * 5/8 = 1,09 + 9/2 = 1,09+4,5 = 5,59

j)0,5 * 0,5 + 1/5 * 1  1/5 = 1/2*1/2  +  1/5 * 6/5 = 1/4 + 6/25 = 25/100 + 24/100=

     = 49/100

k)(3,8 - 2,9)*(3/8 +0,125) = 0,9 * (3/8 + 1/8) = 9/10 * 4/8 = 9/10*1/2 = 9/20

l)(8  1/3 - 8,1)*(9-4  5/7) = (25/3 - 81/10)*(8  7/7 - 4  5/7) =

     = (250/30 - 243/30) *4  2/7  = 7/30  * 30/7 = 1