16-a=9
a=16-9
a=7 spr.16-7=9
_____________
a-29=15
a=29+15
a=44 spr.44-29=15
__________________
12:m=1/4
m=12:1/4=12*4/1=48/1=48
m=48spr.12:48=12/48=1/4(skracamy ten ułamek przez 12)
__________________________________________________
x*3 1/2=2/7
x=2/7:3 1/2
x=2/7:7/2=2/7*2/7=4/49
Spr.4 /49*3 1/2=4/49*7/2=2/7(skracamy2z4 i 7z49)
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16-a=9
a=16-9
a=7 spr.16-7=9
_____________
a-29=15
a=29+15
a=44 spr.44-29=15
__________________
12:m=1/4
m=12:1/4=12*4/1=48/1=48
m=48spr.12:48=12/48=1/4(skracamy ten ułamek przez 12)
__________________________________________________
x*3 1/2=2/7
x=2/7:3 1/2
x=2/7:7/2=2/7*2/7=4/49
Spr.4 /49*3 1/2=4/49*7/2=2/7(skracamy2z4 i 7z49)