Пошаговое объяснение:
5.4+(3.7-5.4)=5.4-1.7=3.7
-8.79+(-1.76+8.79)=-8.79+7.03=15.82
3.4+(2.9-3.4+4.1)=3.4+3.6=7
(4.67-3.94)+(3.94-3.67)=0.73+0.27=1
7.2-(3.2-5.9)=7.2+2.7=9.9
(4.8+2.75)-(4.8-3.25)=7.55-1.55=6
-6.9-(4.21-10.9)=-6.9+6.69=-0.21
(3.72-5.43)-(4.57+3.22)=-1.71-7.79=-9.5
2/7+(5/7-3/7)=2/7+3/7=9/7
4 2/5+(-2/5-3/7)=4 2/5-29/35=-3 4/7
Пошаговое объяснение:
5.4+(3.7-5.4)=5.4-1.7=3.7
-8.79+(-1.76+8.79)=-8.79+7.03=15.82
3.4+(2.9-3.4+4.1)=3.4+3.6=7
(4.67-3.94)+(3.94-3.67)=0.73+0.27=1
7.2-(3.2-5.9)=7.2+2.7=9.9
(4.8+2.75)-(4.8-3.25)=7.55-1.55=6
-6.9-(4.21-10.9)=-6.9+6.69=-0.21
(3.72-5.43)-(4.57+3.22)=-1.71-7.79=-9.5
2/7+(5/7-3/7)=2/7+3/7=9/7
4 2/5+(-2/5-3/7)=4 2/5-29/35=-3 4/7