Question
Draw a line segment $PQ = 6.2\ cm$. Draw the perpendicular bisector of $PQ.$

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| $1.$ |
$625 \times 436 = 625 \times 400 + 625 \times 30 + 625 \times 6$
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$a$
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Commutativity under addition.
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$2.$
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$25 \times 69 \times 8 = 25 \times 8 \times 69$
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$b$
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Commutativity under multiplication.
|
|
$3.$
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$60 + 19758 + 840 = 60 + 940 + 19758$
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$c$
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Distributivity of multiplication over addition.
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| $8$ | $1$ | $3$ | $7$ | $6$ | $5$ | $5$ | $4$ | $4$ | $2$ |
| $4$ | $9$ | $5$ | $3$ | $7$ | $1$ | $6$ | $5$ | $2$ | $7$ |
| $7$ | $3$ | $8$ | $4$ | $2$ | $8$ | $9$ | $5$ | $8$ | $6$ |
| $7$ | $4$ | $5$ | $6$ | $9$ | $6$ | $4$ | $4$ | $6$ | $6$ |

|
$(a)$
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Area of a rectangle
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$(i)$
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$\pi\text{r}^2$
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$(b)$
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Area of a square
|
$(ii)$
|
$4 \times $ side
|
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$(c)$
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Perimeter of a rectangle
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$(iii)$
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$l \times b$
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|
$(d)$
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Perimeter of a square
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$(iv)$
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$(side)^2$
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|
$(e)$
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Area of a circle
|
$(v)$
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$2(l + b)$
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