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a) 1 - 5/7 + 3/7=2/7+3/7=5/7
b) 2 3/5 - 4/5=1 8/5-4/5=1 4/5
c) 1/3 * 4/5=4/15
4
d) 2/5 : 2 1/2 =2/5 :5/2=2/5 * 2/5=4/25
e) 7,88 - 1/100 + 1,245 + 3/4 = 7,88-0,01+1,245+0,75=9,865
f) 1,2 + 5/6=1 1/5+5/6=1 6/30+25/30=1 31/30=2 1/30
g) 72,4 +43,6 + 25,55= 141,55
h) 0, 248 + 12,42 - 3,31=12,668-3,31=9,358
i) 1 5/6 + 7/8 - 5/6 - 1 4/9=1 20/24+21/24-30/36-1 16/36=1 41/24-1 46/36=2 17/24-2 10/36=2 51/72-2 20/72=31/72
Zapisz w postaci ułamków zwykłych i skróć.
0,375=375/1000=3/8
0,6=6/10=3/5
0,25=25/100=1/4
0,125=125/1000=1/8
zad 3.
Zapisz w postaci dziesiętnej.
a) 8 1/8=8 125
b) 33/20=165/100=1,65
c) 6+3/10+3/100=6+0,3+0,03=6,33