Question

a 4,2+1/4= 2,35+1/2= 3,203+1/4= 142/3+0,5= b 2,35-3/4= 4,15-11/4= 31,105-1/8= 5/8-0,5 c 12,2*1/4= 4,5*21/4= 7,2*1/3= 4,9*2/7= d 1,3;51/5= 2,35;92/5= 14/5;2,25= 1,7;1/20=

Answer 1

4,2+1/4= 4 1/5+1/4=4 4/20+5/20=4 9/20.

2,35+1/2= 1,35+0,5=1,85

3,203+1/4=3,203+ 0,25=3,453

142/3+0.5=47 1/3 + 1/2= 47 4/12 + 6/12= 47 10/12=47 5/6

2,35-3/4= 2,35-0,75=1,6

4,15-11/2= 4,15-2,2=1,95

31,105-1,8=29.305

5/8-0.5=0,625-0.5=0.125

12,2*21/4=61/5 * 21/4=1281/20=64 1/20

7,2*21/4=15/5*21/4=1115/20=55 15/20

4,9*1/3=4 9/10 * 1/3=4/27

1,3:51/5=1 3/10 :51/5=13/10*5/51=13/102

2,35:92/5=2 35/100 : 92/5= 235/100 *5/92=235/2250

14/5:2,25=14/5:2 1/4=14/5 *4/9=56/40=1 16/40

1,7:1/20=1 7/10 : 1/20= 7/10 *17/10=119/100=1 19/100