Question

The teacher distributes 5 pencils per student. Can you tell how many pencils are needed, given the number of students? (Use s for the number of students.)

Radha is drawing a dot Rangoli (a beautiful pattern of lines joining dots with chalk powder. She has 9 dots in a row. How many dots will her Rangoli have for r rows? How many dots are there if there are 8 rows? If there are 10 rows?​

Answer 1

${\underline{\underline{\large{\textsf{\textbf{\pink{Question : }}}}}}}$

The teacher distributes 5 pencils per student. Can you tell how many pencils are needed, given the number of students? (Use s for the number of students.)

${\underline{\underline{\large{\textsf{\textbf{\pink{Solution : }}}}}}}$

❍Let the number of students be "s".

$\sf{Total \ number \ of \ pencils \ = Number \ of \ pencils \ given \ to each \ students × Number \ of \ students.}$

${\sf{\pink{=5s}}}$

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${\underline{\underline{\large{\textsf{\textbf{\pink{Question : }}}}}}}$

Radha is drawing a dot Rangoli (a beautiful pattern of lines joining dots with chalk powder. She has 9 dots in a row. How many dots will her Rangoli have for r rows? How many dots are there if there are 8 rows? If there are 10 rows?

${\underline{\underline{\large{\textsf{\textbf{\pink{Solution : }}}}}}}$

Number of dots in 1 row = 9

Number of rows = r

$\sf{Total \ number \ of \ dots \ in \ r \ rows = Number \ of rows \ × Number \ of \ dots \ in \ a \ row}$

${\sf{\pink{=9r}}}$

$\sf{Number \ of \ dots \ in \ 8 \ rows = 8 × 9 = 72}$

$\sf{Number \ of \ dots \ in \ 10 \ rows = 10×9=90}$

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Answer 2

1.Number of dots in 1 row = 9

Number of rows = r

Total number of dots in r rows = (Number \ of rows × Number of dots in a row)Total number of dots in r rows=Number ofrows ×Number of dots in a row

=9r

8 \ rows = 8 × 9 = 72Number of dots in 8 rows

2.Number of dots in 1 row = 9

Number of rows = r

$\sf{Total \ number \ of \ dots \ in \ r \ rows = Number \ of rows \ × Number \ of \ dots \ in \ a \ row} \\ Total number of dots in r rows=Number \: of \: \: rows \\ ×Number of dots in a row$

=9r

8 rows = 8 × 9 = 72

Number of dots in 8 rows=8×9=72