For each activity below, drag the sliders to change the arrows on the number line. Use the number line to help you answer the questions below.
1. Using the model above, model the mathematical expressions below:[br][br]3+5[br]2+8[br]5+7[br][br]2. Using the model above, find an expression that would give the following answer:[br][br]5[br]4[br]9
1. Using the model above, model the mathematical expressions below:[br][br]-3 + -5[br]-2 + -8[br]-5 + -7[br][br]2. Using the model above, find an expression that would give the following answer:[br][br]-5[br]-4[br]-9
What do you notice when adding 3+5 and -3 + -5? Is there a shortcut?