Kayla's Coins (Add whole measurements of mass in standard units to make an estimate.)

The video tutorial explains how to add weights of coins to find both an estimated and exact total. It begins with a problem involving two groups of coins weighing 20 grams and 39 grams. The tutorial first demonstrates estimating the total by rounding 39 to 40, making the addition easier, resulting in an estimated total of 60 grams. It then shows how to calculate the exact total using column addition, resulting in 59 grams. The lesson emphasizes checking units and writing the final answer with units. The video concludes by summarizing the process of adding whole measurements of weight.

What is the total weight of the coins Kayla has after receiving more from her dad?

Why is it important to check that the measurements are in the same units?

How can you estimate the total weight of Kayla's coins?

What is the exact total weight of Kayla's coins?

What should you remember to do after calculating the total weight?