Cwiczenie 6 str.82.Matematyka wokoł nas kl.5 Oblicz: a) 10:2/3*1 1/2= b)12*2 3/4:2 3/4= c)4 1/2:1 1/2-1 3/4= d)20-6 3/4:4 1/2=
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a)10:2/3*1 1/2=10/1*3/2*3/2=90/4=22 2/4=22 1/2
b)12*2 3/4:2 3/4=12/1*11/4*4/11=12/1=12
c)4 1/2:1 1/2-1 3/4 =9/2*2/3-7/4=18/6-7/4=36/12-21/12=15/12=1 3/12=1 1/4
d)20-6 3/4:4 1/2=20/1-27/4*2/9=20/1-54/36=360/18-27/18=333/18=18 1/2