Matematyka
gabra2
2017-06-25 02:28:04
zad 18 a 2/3-1/2 kreska ułamkową 3/4-2/3 b 6/5-2/7 kreska ulamkowa 2/5+2/3) c 1 1/2-2,75 kreska ułamkową 1 5/6-2 1/12 d 1,25+27/8 kreska ulamkowa 1 5/16+3/8 e 1 5/6-0,625 kreska ulamkowa 4/13-25/39
Odpowiedź
Pensyl
2017-06-25 07:05:01

Zad 18 a) 2/3-1/2 ------------ = 3/4-2/3 """"4/6 - 3/6 = --------------- = """ 9/12 - 8/12 """" 1/6  = ----------- = """" 1/12 = 1/6 : 1/12 = = 1/6 * 12/1= = 1/1 * 2/1= = 2/1= = 2 b) 6/5-2/7 ----------- = 2/5+2/3 """" 42/35 - 10/35 = ---------------------- = """"" 6/15 + 10/15 """"" 32/35 = --------------- = """""16/15 = 32/35 : 16/15 = = 32/35 * 15/16 = = 2/7 * 3/1 = = 6/7 c) 1 i 1/2-2,75 -------------------- = 1 i 5/6-2 i 1/12 """""1 i 1/2 - 2 i 75/100 = ------------------------------- = """"" 1 i 10/12 - 2 i 1/12 """" 1 i 1/2 - 2 i 3/4 = ----------------------- = """" - 3/12 """""  1 i 2/4 - 2 i 3/4  = ------------------------------ = """" - 1/4 """"" - 1 i 1/4 = ---------------- = """" - 1/4 = - 1 i 1/4 : (-1/4) = = - 5/4 * (-4/1) = = - 5/1 * (-1/1) = =  5/1= = 5 d 1,25+27/8 ----------------- = 1 i 5/16+3/8 """ 1 i 25/100 + 27/8 = ------------------------------ = """1 i 5/16 + 6/16 """"" 1 i 1/4 + 27/8 = -------------------------- = """"1 i 11/16 """"1 i 2/8 + 27/8 = ----------------------- = """""27/16 """"10/8 + 27/8 = ----------------- = """" 27/16 = 37/8 : 27/16 = = 37/8 * 16/27 = = 37/1 * 2/27 = = 74/27= = 1 i 20/27 e) 1 i 5/6-0,625 -------------------  = 4/13-25/39 """ 1 i 5/6 - 625/1000  = ---------------------------- = """" 12/39 - 25/39 """""" 1 i 5/6 - 5/8  = --------------------------- = """""" - 13/39 """"" 1 i 20/24 - 15/24 = --------------------------- = """" - 1/3 """" 1 i 5/24 = ------------------ = """"" - 1/3 = 29/24 : (-1/3) = = 29/24 * (-3/1) = = 29/8 * (-1/1)= = - 29/8= = - 3 i 5/8

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