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Q. Calculati:
a) 9 x (7+5);2 8
12 x (9-5);
10x (8 + 7);
c) 81–2 x (16-9);
87+90:(11-2);
(7+8)x(5+4);
b) 7+9x6;
9-0x9;
8+6x8;
d) 9+48 x (54+46);
8+77:(98–87);
(9+7):(9-7).