Calculate:
(i)
\(\begin{aligned} &\space(9.37-0.63)\times(-0.4) \\\\&=8.74\times(-0.4) \\\\&=-3.496. \end{aligned}\)
(ii)
\(\begin{aligned} &\space2.34+3.1\div0.2 \\\\&=2.34+(3.1\div0.2) \\\\&=2.34+15.5 \\\\&=17.84. \end{aligned}\)
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