36/9=4 36/12=3
72/9=8 72/12=6
36+72=108
108*8=864
<span>(90050-219*380+190)/90=78</span>
<span>1)219*380=83220; 2)90050-83220=6830; 3)6830+190=7020; 4)7020:90=78</span>
<span><span>(302281-12649)/48+3966=10000</span></span>
<span><span>1)302281-12649=289632; 2)289632:48=6034; 3)6034+3966=10000</span></span>
<span><span><span>(21000-308*29)/4+14147/47=3318</span></span></span>
<span><span><span>1)308*29=8932; 2)21000-8932=12068; 3)12068:4=3017; 4)14147:47=301; 5)3014+301=3318</span></span></span>
<span><span><span><span>13440/32/7+7*123=921</span></span></span></span>
<span><span><span><span>1)13440/32=420; 2)420:7=60; 3)7*123=861; 4)60+861=921</span></span></span></span>
<span><span><span><span><span>(1638/39+13284/36)/0=</span></span></span></span></span>
<span><span><span><span><span>1)1638:39=42; 2)13284:36=369; 3)42+369=411; 4)411:0=тут противоречие.на ноль делить нельзя</span></span></span></span></span>
<span><span><span><span><span><span>509*603-999999/11+3982=220000</span></span></span></span></span></span>
1)509*603=306927; 2)999999/11=90909; 3)306927-90909=216018; 4)216018+3982=220000
1/12+1/8=2/24+3/24=5/24 - выполнят две бригады
1)1/4+1/6=3
2)3:10=3/1*1/10=3/10
ответ. 3/10
1)5/6-1/4=4/2
2)4/2:7=4/2*1/7=4/14=2/7
ответ.2/7
1-1/3=3/3-1/3=2/3(куска)-остаток;
2/3×5/6=5/9(куска)-это 5/6 остатка;
2/3-5/9=6/9-5/9=1/9(куска)-приходится на 8м;
8÷1/9=8×9=72(м)-было в куске