(40+5)+(20-10)=55
40+5=45
20-10=10
45+10=55
А) 6:2=12:4, 6:12=2:4
б) 1/30:1/15=1/10:1/5, 1/30:1/10=1/15:1/5
в)40:4=5:1/2, 40:5=4:1/2
<span>46057:a,якщо а=53</span>
<span>46057:53=869</span>
<span><span>b:64,якщо=49536</span></span>
<span><span>49536:64=774</span></span>