46-21=24
59-48=11
87-30=57
475-253=222
398-71=327
25:5*3=15
3 1/3:2=10/3:2=10/3*1/2=5/3
<span> 2 1/2:1/10+9/10=5/2*10+9/10=25 9/10</span>
<span><span>х:6/17=3 2/5</span></span>
<span><span>х=17/5*6/17</span></span>
<span><span>х=6/5=1 1/5</span></span>
Например:23+4=27. 45-5=40 12+4=16. 32-12=20