MARKING SCHEME FOR JSS1 MATHEMATICS SECOND TERM CAT 2

SECTION A: OBJECTIVE TEST

ALLOCATION OF MARKS: ¼ mark each = 5 marks

SECTION B: ESSAY

ALLOCATION OF MARKS: 5 marks each = 10 ÷ 2 = 5 marks

1.\(\begin{array}& & 1 & 0 & 1 & 1_2 \\ + & 1 & 0 & 0 & 1_2 \\ \hline 1 & 0 & 1 & 0 & 0_2 \\\hline \end{array}\)

(1 mark)

\(\begin{array}& 1 & 0 & 1 & 0 & 0_2 \\ -& & 1 & 0 & 1_2 \\ \hline & 1 & 1 & 1 & 1_2 \\\hline \end{array}\)

(1 mark)

\(\begin{array}& & & & 1 & 1 & 1 & 1_2 \\ × & & & & 1 & 1 & 0_2 \\ \hline & & & 0 & 0 & 0 & 0_2 \\ & & 1 & 1 & 1 & 1_2 & \\ + & 1 & 1 & 1 & 1_2 & & \\ \hline 1 & 0 & 1 & 1 & 0 & 1 & 0_2\\ \hline\end{array}\)

(3 marks)

TOTAL = 5 MARKS

2.(a) \(6p -2q  + 4r -2p   +  5q\)

\(6p -2p  + 5q -2q   +  4r\)  (1 mark)

\(4p  +  3q  +  4r\)  (1 mark)

2.(b) \(m( m + 2) m^2 + 3m\)

\(m^2  +2m  +  m^2  +3m\)  (1 mark)

\(m^2  +  m^2  +2m  +3m\)  (1 mark)

\(2m^2  +   5m\)  (1 mark)

TOTAL = 5 MARKS