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[tex]a)86.23 - 0.1 = 86.13 \\ \\ b)17.4 \times 5.2 = 90.48 \\ \\ c)9.7 \div 0.01 = 970 \\ \\ d)7.2 \div 100 = 0.072 \\ \\ e)1.84 \div 0.08 = 23[/tex]