Using the game board students will practice rounding whole numbers to the nearest 10,100, and 1,000.
Each opponent takes turns reading a question and then choosing a number to round to the nearest 10, 100, or 1,000. The answer is to be checked by the opponent.
4.NBT.2 "Read and write multi-digit whole numbers using base-ten numerals, number names, and expanded form. Compare two multi-digit numbers based on meanings of the digits in each place, using >, =, and < symbols to record the results of comparisons."
This activity can be adjusted for ELL students by using a smaller deck of cards. The game can first be mastered by using only the black cards (positive numbers). Once the student(s) is comfortable with the concept of the game with the positive numbers, the negative numbers (red cards) can be introduced. This activity can be used for younger ages by working with only the black cards, and modeling proper mathematical words, such as "greater than" and "less than".
Students work in pairs, battling against one another for this card game. Each person turns over one card at a time. Red cards represent negative numbers, and black cards represent positive numbers. The person with the highest valued card is the winner for that round. The student that accumulates the most cards (when each player is out of cards) is the winner!