Răspuns:
1. 2.8dal + 3.5 dal = 6.3 dal
2. 3.74:4=0.935
3. 7.18-x=3.21
X= 7.18-3.21=3.97, verificare 7.18-3.97=3.21
4. Tranform 0.007dam = 0.07 m, 1400 dm = 140 m
0.07m + 2.3 m + 140m = 142.37 m = 142370 m ^3
6. 5 galeti...... 61 L
6 galeti..... X rezulta X= 6×61 supra 5= 73.2 litri
7. 1.5 ×[6.4+2.2×(3.12-4.61)]÷2=
1.5 × (6.4+6.864-10.142) :2=
1.5×(13.264-10.142):2=
1.5×3.122:2=
4.683:2=2. 3415
8 P= 2×L+2×l, L= 6 cm
0.1dm= 1 cm = l
P= 2×6+2×1=12+2=14 cm
Aria la drept= L×l= 6×1=6 cm ^2