математика 663 задание помогите
1)3m•8; 2)1,2m•(-4n); 3)-⅔m•(-6n);

4)9a•(-0,3); 5)-3,4a•2b; 6)-4⅙a•0,6b;

7)-5,2x•(-4); 8)-4x•0,y; 9)-1-² x•(-⅓•y)
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