Addition and Subtraction of Integers

While playing a game, Ananya lost $40$ points in the first round, gained $70$ points in the second round and then lost $30$ points in the third round. After a short break, she again lost $30$ points in the fourth round and $50$ points in the fifth round. If she started with $280$ points, how many points did she have in the end?

$\frac{{\left(0.05\right)}^2+{\left(0.41\right)}^2+{\left(0.073\right)}^2}{{\left(0.005\right)}^2+{\left(0.041\right)}^2+{\left(0.0073\right)}^2}=$

In the following figure, $\mathrm{OAB}$ is a triangle and $\mathrm{AB}\parallel \mathrm{DC}$. If the area of $\Delta CAD=140{ \mathrm{cm}}^2$ and the area of $\Delta \mathrm{ODC}=172{ \mathrm{cm}}^2$. If the area of $∆\mathrm{OAC}$ is $k {\mathrm{cm}}^2$, find $k$.

Take two integers $4,6$ and show that the difference of any two integers will always be an integer.

Explain with an example, that the difference of any two integers will always be an integer.

$\left(-2\right)+\left(-1\right)+0+1+2=$_____.

Sum of given integer show closure property.

$5,2,8,6,10,12$.               [Enter true/false]

Solve.

The initial balance of a student's bank account is $₹690$. He has made the following transaction in a month.

Deposit $(+)$ of $₹89$.

If the amount that is left in the student's bank account is $₹k$, then find the value of $k$.

If the amount that is left in the student's bank account is$₹k$, if he has made the following transaction in a month. His initial balance is $₹675$ and his withdrawal $(-)$ of $₹350$. Find the value of $k$

$17+$ _____ $=17$

Solve: $23-41-11$

Solve:

$400+\left(-1000\right)+\left(-500\right)$

Evaluate: $-31+45+(-23)$.