170 - 100%
Х - 4%
Х+ 170*4:100
Х= 6,8 кг соли
17=17*1
17=1*17
.................................................
2×1=2. 2×2=4. 2×3=6. 2×4=8. 2×5 10. 2×6=12. 2×7=14 2×8=16. 2×9 =18. 2×10=20.
16,28+5,395-1,18-4,305=16,19
1)16,28+5,395=21,675
2)21,675-1,18=20,495
3)20,495-4,305=16,19