Exercise 3.3 - Chapter 3 - Patterns - Term 1 - 4th Maths Guide Samacheer Kalvi Solutions

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Ex $3.3$
Question $1 .$
Circle the correct multiplication fact (by using method of casting out nine).
(a) $312 \times 36=11232$
(b) $723 \times 24=17508$
(c) $132 \times 43=5676$
Answer:
(c) $132 \times 43=5676$
$132 \times 43=5676$
$6 \times 7=5+6+7+6$
$42=24$
$6=6$

Question $2 .$
Circle the correct division fact (by using method of casting out nine).
(a) $728 \div 4=182$
(b) $1580 \div 20=78$
(c) $7785 \div 9=865$
Answer:
(a) $728 \div 4=182$
$728 \div 4=182$
$8 \div 4=2$
$8=2 \times 4$
$8=8$

$\begin{aligned}
&\text { (b) } 1580 \div 20=78 \\
&1+5+8+0 \div 2+0=7=8 \\
&14 \div 2=15 \\
&14=15 \times 2=30 \\
&14=30 \\
&5=3 \\
&\text { (c) } 7785 \div 9=865 \\
&7+7+8+5 \div 0=8+6+5 \\
&27 \div 0=19 \\
&27=19 \times 0 \\
&9=0 \\
&0=0
\end{aligned}$