For Wanda, I made her do additions. She's good with results up to 20, but gets confused about the tens. So first I had her add multiples of ten to get used to the scale. Then I had her add a double digit with a single digit without need to carry, like 56+3.

Then I had her round large numbers to the nearest hundreds. The kids have a hard time dealing with large numbers. I want to show them that they are the same as single digit numbers. It's just the scale is different. I also want them to have a sense for numbers and understand that most of the time you only care about answers up to a certain precision. Whether you pay $25,137 or $24,972 for a car is not important.

Then I had her round large numbers to the nearest hundreds. The kids have a hard time dealing with large numbers. I want to show them that they are the same as single digit numbers. It's just the scale is different. I also want them to have a sense for numbers and understand that most of the time you only care about answers up to a certain precision. Whether you pay $25,137 or $24,972 for a car is not important.