2. Oblicz pisemnie. Nie zapominaj o działaniach.
a)7,79 : 2,05 =
b) 2,829 : 0,082 =
c) 0,856 : 0,016 : 0,5 =
3. Oblicz
a) 2⁵/₈ + 1¾ -1½ =
b) 1¹/₇ * 1¾ =
c) 1⅓ : 12 =
d) 2⅓ : 3,2 =
4. Oblicz
a) 5,75 + 1³/₅ =
b) 3⅙ - 1,4 =
c) 1,04 * 3⅛ =
d) 2⅓ : 3,2 =
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a)...=3,8
b)...= 34,5
c)...=53,5:0,5=31,25
2.
a) 7,79 : 2,05 = 779 : 205 = 3,8
b) 2,829 : 0,082 = 2829 : 82 = 34,5
c) 0,856 : 0,016 : 0,5 = 856 : 16 : 0,5 = 53,5 : 0,5 = 535 : 5 = 107
3.
a) 2⁵/₈ + 1¾ -1½ = 44/12 + 21/12 - 1 1/2 = 65/12 - 18/12 = 47/12 = 3 11/12
b) 1¹/₇ * 1¾ = 8/7 * 7/4 = 8/4 = 2
c) 1⅓ : 12 = 4/3 : 12/1 = 4/3 * 1/12 = 1/9
d) 2⅓ : 3,2 = 7/3 : 32/10 = 7/3 * 10/32 = 35/48
4.
a) 5,75 + 1³/₅ = 5,75 + 1,6 = 7,35
b) 3⅙ - 1,4 = 3 1/6 - 1 4/10 = 19/6 - 14/10 = 95/30 - 37/30 = 58/30 = 1 14/15
c) 1,04 * 3⅛ = 1,04 * 1,125 = 1,17
d) 2⅓ : 3,2 = 2 1/3 : 3 2/10 = 7/3 * 10/32 = 70/96 = 35/48