Evaluate the expression. Write your answer in simplest form.
1920+(−1820)+1720+(−1620)+ ... +(−420)+320+(−220)+120=
please help I have been stuck for over a hour now
pls
+26367 Evaluate the expression. Write your answer in simplest form.
1920+(-1820)+1720+(-1620)+ ... +(-420)+320+(-220)+120=
\(\small{ \begin{array}{|rcll|} \hline && \underbrace{1920-1820}_{=100} +\underbrace{1720-1620}_{=100} +\underbrace{1520-1420}_{=100} +\underbrace{1320-1220}_{=100} +\underbrace{1120-1020}_{=100} +\underbrace{920-820}_{=100} +\underbrace{720-620}_{=100} +\underbrace{520-420}_{=100} +\underbrace{320-220}_{=100} +120 \\ &=& 9\cdot 100 + 120 \\ &=& 900 + 120 \\ &=& \mathbf{1020} \\ \hline \end{array} } \)
+26367 Evaluate the expression. Write your answer in simplest form.
1920+(-1820)+1720+(-1620)+ ... +(-420)+320+(-220)+120=
\(\small{ \begin{array}{|rcll|} \hline && \underbrace{1920-1820}_{=100} +\underbrace{1720-1620}_{=100} +\underbrace{1520-1420}_{=100} +\underbrace{1320-1220}_{=100} +\underbrace{1120-1020}_{=100} +\underbrace{920-820}_{=100} +\underbrace{720-620}_{=100} +\underbrace{520-420}_{=100} +\underbrace{320-220}_{=100} +120 \\ &=& 9\cdot 100 + 120 \\ &=& 900 + 120 \\ &=& \mathbf{1020} \\ \hline \end{array} } \)
