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4+4+5×(6×6:6-6)+7-8:8×9

Răspuns :

4+4+5×(6×6:6-6)+7-8:8×9=
=8 + 5×0 + 7-9=
= 8+7-9=
= 15-9=
=6
4+4+5×(36:6-6)+7-8:8×9=4+4+5×(6-6)+7-8:8×9
=4+4+5×0+7-8:8×9
=4+4+0+7-1×9
=4+4+0+7-9
=8+0+7-9
=8+7-9
=15-9
=6