Answer :
I hope this will be helpful.
[tex]65*7=65*(1+1+1+1+1+1+1)=65+65+65+65+65+65+65=455[/tex]
because she did 65 sit ups each day a week and the week has 7 days.
[tex]65*7=65*(1+1+1+1+1+1+1)=65+65+65+65+65+65+65=455[/tex]
because she did 65 sit ups each day a week and the week has 7 days.