1) 7/20 * 9 = 63/20
2) 12 * 7/36 = 84/36 = 7/3
3) 1 8/15 / 4 = 23/15 / 4 = 23/60
4) 3/8 / 4 1/2 = 3/8 / 9/2 = 1/12
5) 63/20 + 7/3 + 23/60 + 1/12 = 189/60 + 140/60 + 23/60 + 5/60 = 357/60 = 5 57/60 = 5 19/20
1. (7/20)*9=63/20.
2. 12*7/36=7/3.
3. 1⁸/₁₅:4=(23/15):4=23/60.
4. (3/5):4¹/₂=(3/5):(9/2)=3*2/(5*9)=2/15.
5. 63/20+7/3+23/60+2/15=(63*3+7*20+23*1+2*4)/60=
=(189+140+23+8)/60=360/60=6.
1) 7/20 * 9 = 63/20
2) 12 * 7/36 = 84/36 = 7/3
3) 1 8/15 / 4 = 23/15 / 4 = 23/60
4) 3/8 / 4 1/2 = 3/8 / 9/2 = 1/12
5) 63/20 + 7/3 + 23/60 + 1/12 = 189/60 + 140/60 + 23/60 + 5/60 = 357/60 = 5 57/60 = 5 19/20
1. (7/20)*9=63/20.
2. 12*7/36=7/3.
3. 1⁸/₁₅:4=(23/15):4=23/60.
4. (3/5):4¹/₂=(3/5):(9/2)=3*2/(5*9)=2/15.
5. 63/20+7/3+23/60+2/15=(63*3+7*20+23*1+2*4)/60=
=(189+140+23+8)/60=360/60=6.