Răspuns :
1. 9x2x4=72
3x2x9=9x6
32:8=36:9
3x3x4=6x6
1,2,3,4,5,6 x 9≤54
56, 49, 42, 35, 28, 21, 14, 7 ≤ 8
6. 139x5+2=697 (o)
106x7+3= 745 (r)
245x8+6=1966 (a)
3x2x9=9x6
32:8=36:9
3x3x4=6x6
1,2,3,4,5,6 x 9≤54
56, 49, 42, 35, 28, 21, 14, 7 ≤ 8
6. 139x5+2=697 (o)
106x7+3= 745 (r)
245x8+6=1966 (a)
a*2*4=72
a*8=72
a=72:8
a=9
3*2*m=9*6
6*m=54
m=54:6
m=9
32:y=36:9
32:y=4
y=32:4
y=8
3*3*n=6*6
9*n=36
n=36:9
n=4
q*9<54
q<54:9
q<7 (mai mic sau egal)
z:7<8(*mai mic sau egal )
z=8*7
z=56
2.
42:6=7
48:6=8
54:6=9
a*8=72
a=72:8
a=9
3*2*m=9*6
6*m=54
m=54:6
m=9
32:y=36:9
32:y=4
y=32:4
y=8
3*3*n=6*6
9*n=36
n=36:9
n=4
q*9<54
q<54:9
q<7 (mai mic sau egal)
z:7<8(*mai mic sau egal )
z=8*7
z=56
2.
42:6=7
48:6=8
54:6=9