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48÷8÷2/5=
12+6÷(3+9÷3)=
45÷5÷3/6=
21-21÷7/(4-5÷5)=


Răspuns :

48:8:2/5=            12+6:(3+9:3)=       45:5:3/6=            21-21:7/(4-5:5)=
6:2/5=                 12+6:(3+3)=         9:3/6=                 21-3/(4-1)=
3/5=15                12+6:6=               3/6=18                21-3/3=
                          12+1=13                                         21-9=12
12+6÷(3+9÷3)=12+6÷6=12+1=13
45÷5÷3/6=9·6/3=9/3
21-21÷7/(4-5÷5)=21-3/3=21-1=20