14.
I (4 1/2) *(2 4/5) - (1 3/5)*(2 1/2) I=
=I 9/2 * 14/5 - 8/5*5/2 I= I 126/10 - 40/10 I= 86/10 = 8,6
15.
3 3/5= 18/5 ; 1 1/6=7/6
18/5 +(18/5+7/6)+(18/5+7/6+7/6)+(18/5+7/6+7/6+7/6)=
=4*18/5 + 6*7/6= 72/5 + 7= 144/10 +7=14,4+7= 21,4
1. 4,5*2,8= 12.6 1.6*2.5=4 12.6-4=8,6 bezwzględnej
2.3 3/5= 3 18/30 1 1/6= 1 5/30
3 3/5*4=14.4=14 12/30
1 5/30+2 10/30+3 15/30=7
14.4+7=21.4
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14.
I (4 1/2) *(2 4/5) - (1 3/5)*(2 1/2) I=
=I 9/2 * 14/5 - 8/5*5/2 I= I 126/10 - 40/10 I= 86/10 = 8,6
15.
3 3/5= 18/5 ; 1 1/6=7/6
18/5 +(18/5+7/6)+(18/5+7/6+7/6)+(18/5+7/6+7/6+7/6)=
=4*18/5 + 6*7/6= 72/5 + 7= 144/10 +7=14,4+7= 21,4
1. 4,5*2,8= 12.6 1.6*2.5=4 12.6-4=8,6 bezwzględnej
2.3 3/5= 3 18/30 1 1/6= 1 5/30
3 3/5*4=14.4=14 12/30
1 5/30+2 10/30+3 15/30=7
14.4+7=21.4