1. Dane liczby zapisz w postaci :
a) dziesiętnej
3 ½ =
⁷⁻₄ =
²⁷⁻₂₀ =
³⁻₂₅ =
1²⁻₅ =
b) ułamków zwykłych nieskracalnych
0,8 =
0,75 =
3,25 =
0,3 =
1,2 =
5,08 =
2,125 =
21,5 =
17,008 =
3.Oblicz
a) Zamieniając na ułamki zwykłe ( pamiętaj o skracaniu!)
0,5 + ⅔ =
2,5 * 2²/₇ =
1,8 - 1⅔ =
2 ¼ : 0,3
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a) 3 1/2 = 3 50/100 = 3,50
7/4 = 175/100 = 0,175
27/20 = 135/100 = 0,135
3/25 = 12/100 = 0,12
1 2/5 = 1 40/100 = 1,40
b) 8/10 = 4/5
75/100 = 3/4
3 25/100 = 3 5/20 = 3 1/4
3/10
1 2/10 = 1 1/5
5 8/100 = 5 2/25
2 125/1000 = 2 5/40 = 2 1/8
21 5/10 = 21 1/2
17 8/1000 = 4/250 = 2/125
zad 3.
a)
0,5 + 2/3 = 5/10 + 2/3 = 15/30 + 20/30 = 35/30 + 1 5/30
2,5 + 1 2/7 = 2 5/10 + 1 2/7 = 2 35/70 + 1 20/70 = 3 55/70 = 3 11/14
1,8 - 1 2/3 = 1 8/10 - 1 2/3 = 1 24/30 - 1 20/30 = 4/30 = 2/15
2 1/4 : 0,3 = 2 1/4 : 3/10 = 9/4 * 10/3 = 15/2 = 7 1/2