Răspuns :
6 )
12 300< 12 379 < 12 400
7)
a:7 = 10 r5
a=7 * 10 +5
a= 70+5
a=75
8)
a * b= 1 107
a * (b+c)=3 114
a*b +a *c= 3 114
1 107+ a*c = 3 114
a*c= 3114- 1 107
a*c= 2 007
12 300< 12 379 < 12 400
7)
a:7 = 10 r5
a=7 * 10 +5
a= 70+5
a=75
8)
a * b= 1 107
a * (b+c)=3 114
a*b +a *c= 3 114
1 107+ a*c = 3 114
a*c= 3114- 1 107
a*c= 2 007