(b) 98 + 78 = 78 +98
(d) 856 + (352 + 293) = (856 +352) + 293
(f) 81x76-81X34 = 81x(76 – 34)
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Answer:
a solid material of extremely low density, produced by removing the liquid component from a conventional gel.
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Step-by-step explanation:
b)a+b=b+a
this property is called comitative property
d)a+(b+c)=(a+b)+c
this property is called associative property
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