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mentioneaza valoarea de adevăr A/F a propozitiilor9×7-2×7 <(9-2)×7; (8+12-4):4>8:4+12+4; (20+40):5=20:5+40:5

Răspuns :

9x7-2x7<(9-2)x7
63-14<7x7
49<49 fals

(8+12-4):4>8:4+12+4
16:4>2+16
4>18 fals

(20+40):5=20:5+40:5
60:5=4+8
12=12 adevărat