Question

Tolong jawab sekarang ya bsk dikumpulin >>> plissss
1. tentukan hasil penjumlahan pecahan berikut dalam bentuk paling sederhana ....
a.3/2 +2 c. 3 3/7 +5 2/4 e. 2/3 + 2 1/2 + 3 1/4
b.5/6 + 3/4 d. 1/5 + 2 2/3

2. tentukan hasil pengurangan pecahan berikut dalam bentuk paling sederhana .
a. 5/6 - 2 c. 3 2/3 - 2 1/4
b. 7/12 - 5/4 d. 2 1/3 - 4 1/2 - 5 3/4

Answer 1

1
 a. 3/2 + 2 = 3/2 + 2/2
  = 5/2 = 2 1/2 
 b. 5/6 + 3/4
  = 20/24 + 18/24
  = 38/24 = 1 14/24 = 1 7/12
 c. 3 3/7 +  5 2/4 = 24/7 + 22/4
  = 96/28 + 154/28
  = 250/28
  = 8 16/28 = 8 4/7
 d.1/5 + 2 2/3 = 1/5 + 8/3
  = 3/15 + 40/15 = 43/15
  = 2 13/15
 e.2/3 + 2 1/2 + 3 1/4 = 2/3 + 5/2 + 13/4
  = 8/12 + 30/12 + 39/12
  = 77/12 = 6 5/12
2. 
 a. 5/6 - 2 = 5/6 - 2/2
  = 5/6 - 6/6 = -1/6
 b. 7/12 - 5/4
  = 7/12 - 15/12
  = -8/12
 c. 3 2/3 - 2 1/4 = 11/3 - 9/4
  =  44/3 - 27/12 = 17/12 = 1 5/12
 d. 2 1/3 - 4 1/2 - 5 3/4 = 7/3 - 9/2 - 23/4
  = 28/12 - 54/12 - 69/12= -95/12