Oblicz.
a) 6,3 razy (2 i 1/4 razy 6 - 0,5)=
b)3i 3/4 razy 0,8+ 2 i 2/3 razy 0,3=
c) 4,67 - (3 i 5/6-1/3=
d) 3,6:3/5-1 i 1/5=
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63/10*(9/4*6/1-5/10)=63/10*(27/2-5/10)=63/10*(135/10-5/10)=63/10*130/10=819/10=81 9/10
* tzn razy
3 i3/4*0,8+2 i 2/3*0,3=15/4*8/10+8/3*3/10=5/2+4/5=25/10+8/10=33/10=3 i 3/10
w tym momencie skracasz przy mnozeniu na przemian
4,67-(3 i 5/6-1/3)=467/100-(23/6-1/3)=467/100-(23/6-2/6)=467/100-21/6=1401/300-1050/300=
=351/300=1 i 51/300
3,6:3/5-1 i 1/5=36/10:3/5-6/5=36/10*5/6-6/5=6/2-6/5=30/10-12/10=18/10=1 i 8/10=1 i 4/5
tutaj po = tez skracasz ułamki czyli 36/10 i 5/6