12. a. 0,0004kg=0,04dag
b. 53mg=0,053g=0,0053dag
c. 8,75hg=87,5dag
d. 0,14dg=0,0014dag
e. 1,73q=173kg=17300dag
f. 1,5cg=0,015g=0,0015dag
se foloseste scara multiplilor si submultiplilor gramului
q=100kg
kg
hg
dag
g
dg
cg
mg
pentru fiecare treapta inmultesti sau imparti cu 10. daca ai 2 trepte, cu 100 si asa mai departe...
13. a. 3,6402kg=3640,2g=36402dg
b. 29000mg=290dg
c. 0,002g=0,02dg
d. 74002mg=740,02dg
e. 0,00048t=0,48kg=480g=4800dg
f. 1,5cg=0,15dg
14. pentru a putea compara, trebuie sa avem aceeasi unitate de masura. incercam sa aducem la unitatea de masura convenabila in fiecare caz.
a. 3,7kg cu 370g
3700g>370g
3,7kg>370g
b. 2,9g cu 29dag
2,9g<290g
2,9g<29dag
c. 0,004hg cu 4dg
0,4g < 40g
0,004hg < 4dg
d. 2,937g cu 293,69cg
293,7cg>293,69cg
2,937g>293,69cg
e. 968,2t cu 968219kg
968200kg<968219kg
968,2t < 968219kg
f. 3t cu 29q
3000kg>2900kg
3t>29q
15. transformam totul in unitatea de masura ceruta si apoi calculam
a. 13,5q+2940kg=1350kg+2940kg=4290kg
b. 79g-7690cg=79g-76,9g=2,1g
c. 43,25dag-1872dg=432,5g-187,2g=245,3g
d. 984,3mg+2,557dg=9,843dg+2,557dg=12,400dg=12,4dg
e. 562,734hg-23825,2g=5627,34dag-2382,52dag=3244,82dag
f. 37,6q-1500kg=3,76t-1,5t=2,26t
16.a.17,17kg+6230g=17170g+6230g=23400g
b. 48,5kg-235hg+17000g=4850dag-23,5dag+1700dag=6526,5dag
c. 86000dg-5,3kg+140hg=86hg-53hg+140hg=173hg
d. 104kg+55000g-1254hg=10400dag+5500dag-125,4dag=15900dag-125,4dag=15774,6dag
21.e. 9,16dag+0,0000183t-37dg=9,16dag+0,0183kg-0,37dag=
=9,16dag+1,83dag-0,37dag=10,99dag-0,37dag=10,62dag
