Partition the second number to add 10s then 1s

The ArithmeKit 28 from Buzzard Publishing provides an engaging and educational approach to teaching children how to add numbers by partitioning. This method involves breaking down the second number into tens and ones to simplify the addition process. For example, when adding 37 and 12, children are instructed to add the tens first (37 + 10 = 47), followed by the ones (47 + 2 = 49). This technique enhances understanding and fluency in addition, and is further practiced through a series of exercises where children must fill in the missing numbers, such as "37 + 13 = 37 + 10 + 3 = 50." The exercises are designed to encourage children to notice patterns and apply this partitioning strategy across various addition problems.

The ArithmeKit also encourages children to explore different methods of addition, such as using a number line or other resources. One example provided is adding 36 and 27 by starting with 36, adding the tens to make 66, and then the ones to reach a total of 73. The kit prompts children to consider whether there is only one way to solve a problem and challenges them to create their own missing digit problems. This approach not only teaches the arithmetic skill of addition but also fosters critical thinking and problem-solving abilities. The kit includes a variety of problems with different combinations of numbers, ensuring that children can practice and master the concept of adding by partitioning tens and ones.