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odp 3,8
_______ : ___________ =
0,16× ¼ : 6,25 × 4/25
5 4,25 :0,01 5 425
---------------- : ------------------------= -------------: -------------=
16/100*1/4 6,25 x 0,16 4/100 1
=125 :425=125/425
2 Zadanie .
( 1,3 + 2,7 )× 1¼ - 1,2 = 4* 5/4 -1,2=5-1,2=3,8
3 Zadanie .
4/5× 0,5 + 2/9× 0,9 =
=0,8x0,5 +2/9 x 9/10= 0,4 + 1/5= 0,4 +0,2=0,6
4 Zadanie .
3¾ × 4 - 10 × 2/5 =
= 15/4 *4-4=15-4=11