a)0,00000009=0,0001⋅0,0009=0,0001⋅0,0009=0,01⋅0,03=0,0003
b)6,25=625⋅0,01=625⋅0,01=25⋅0,1=2,5
c)121000000=121⋅1000000=121⋅1000000=11⋅1000=11000 c)121000000=121⋅1000000=121⋅1000000=11⋅1000=11000
d)3240000=324⋅10000=324⋅10000=18⋅100=1800
e)0,0144=144⋅0,0001=144⋅0,0001=12⋅0,01=0,12
f)0,000196=196⋅0,000001=196⋅0,000001=14⋅0,001=0,014
g)64000000=6400⋅10000=6400⋅10000=80⋅100=8000
h)3125000000000=3125⋅1000000000=3125⋅31000000000=5⋅1000=5000
i)30,000000216=3216:1000000000=3216:31000000000=6:1000=0,006
j)31728000=31728⋅1000=31728⋅31000=12⋅10=120
k)31331000=31331⋅1000=31331⋅31000=11⋅10=110
l)30,000000729=3729:1000000000=3729:31000000000=9:1000=0,009