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a fost răspuns

Completeaza semnele operatiilor,astfel incat egalitatile sa fie adevarate:1...9.....9.....9=8;1....9.....9.....9=91;1....9....9.....9=90;1....9.....9.....9=11;1....9....9....9=9;1.....9......9......9=10

Răspuns :

1x9-9:9=8
9-1=8

1+9+9x9=91
10+81=91

1x9+9x9=90
9+81=90

1+9+9:9=11
10+1=11

1x9+9-9=9
9+9-9=9
18-9=9

1x9+9:9=10
9+1=10

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