Dau coroana!!!!!sunt de cls a3-a

Dau Coroanasunt De Cls A3a class=
Dau Coroanasunt De Cls A3a class=

Răspuns :

2×[(12+30):7+8×9]=
2×(42:7+8×9)
2×(6+72)
2×78=156
2×(12+30)÷7+8×9
2×42÷7+8×9
2×6+8×9
12+72
84