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b) 1 ⅔ × 12 = ⁵/₃ × ³⁶/₃ = ⁶⁰/₃ = 20
c) 4 ⅖ × 25 = 4,4 × 25 = 110
d) 10 ³/₇ × 21 = ⁷³/₇ × ¹⁴⁷/₇ = ¹⁰⁷³¹/₇ = 1533
Proszę bardzo ;D