d)28:4:1=7:1=7
48:8:2=6:2=3
30:3:5=10:5=2
54:9:3=6:3=2
e)36:4:3=9:3=3
36:9:2=4:2=2
72:8:3=9:3=3
50:5:5=10:5=2
f)64:8:4=8:4=2
40:5:2=8:2=4
24:6:2=4:2=2
27:3:3=9:3=3
2)Compară casuțele:
a)28:4□35:5
28:4=7
35:5=5
28:4>35:5
b)64:8□63:9
64:8=8
63:9=7
64:8>63:9
c)63:7□56:8
63:7=9
56:8=7
63:7>56:8
d)25:5□14:7
25:5=5
14:7=2
25:5>14:7
e)54:9□60:10
54:9=6
60:10=6
54:9=60:10
f)49:7□8:2
49:7=7
8:2=4
49:7>8:2
g)24:6□12:3
24:6=4
12:3=4
24:6=12:3
h)21:3□27:3
21:3=7
27:3=9
21:3<27:3
i)32:8□45:5
32:8=4
45:5=9
32:8<45:5
j)36:6□36:9
36:6=6
36:9=4
36:6<36:9
3)Completează căsuțele:
a)5,8, 10,36:6
b)4,24,2,28
c)72,36:6,6=12:2,5=25:5
5)a.(45:5+11):2
=(9+11):2
=20:2
=10
b.(32:4+16):8
=(8+16):2
=24:2
=12
c.(7*6-12):6
=(42-12):6
=30:6
=5
d.(9*8-12):10
=(72-12):10
=60:10
=6
e.(63:9+14):3
=(7+14):3
=21:3
=7
f.(6*4+24):8
=(24+24):8
=48:8
=6.
g.(5*9-35):2
=(45-35):2
=10:2
=5.
h.(3*9-9):9
=(27-9):9
=18:9
=2.
6.câtul=64:8=8
diferenta lor=64-8=56
56-8=48(am scazut câtul din diferenta)
48:6=8(am micsorat de 6 ori rezultatul obținut)
7) 6*x=9*4-2*10+2
6*x=36-20+2
6*x=18
x=18:6
x=3
7*x=8*7-8*5+10:2
7*x=56-40+5
7*x=16+5
7*x=21
x=21:7
x=3
9*x=9*9-9*8+2*9
9*x=81-72+18
9*x=9+18
9*x=27
x=27:9
x=3
8) 28:7=4(șeptimea nr.28)
56:8=7(optimea nr.56)
4+7=11(suma lor)
9) (49:7-2)*9+9
=5*9+9
=45+9
=54
54 este numarul obținut.
