4th grade addition 5 digits horizontally scientist game - Addition facts in 3rd, 4th and 5th grades involving large numbers which go up to the ten thousands place. The principles for adding large numbers is no different from those learned in the previous addition problems solved prior to this one. There will be problems which warrant students to add and carry numbers places forward while others do not involve carrying. In spite of the similarities in skills learned, students will still gain new skills related to adding large numbers. This activity is an interactive math online quiz in which students solve problems and get their scores instantly. At the end of the activity, an aggregate of points will be displayed on the dash boards. If the performance was not up to expectation, students could do it over again. Have fun learning and please share.