$2438.79 - 1233.99 + 399.99 = ? + 989.99$

$A$ piece of cloth measured with a metre stick,which is $1 \ cm$ short,is found to be $100 \ m$ long. Reckoning the metre stick as being correct,what is the actual length of the cloth in $cm$?

$63 + 371 \div 7 = ?$

$A$ boy added all natural numbers from $1$ to $12,$ however he added one number twice due to which the sum became $80.$ What is the number which he added twice?

$2439.97 - 1234.01 + 401.99 = ? + 989.99$

In a division sum,the quotient is $120$,the divisor is $456$,and the remainder is $333$. Find the dividend.