5th Grade Standard
5.NBT.B.7 Add, subtract, multiply, and divide decimals to hundredths, using concrete models or drawings and strategies based on place value, properties of operations, and/or the relationship between addition and subtraction; relate the strategy to a written method and explain the reasoning used.
8.1 Lesson from the book
8.1 Lesson from the book - Another option
Another video that models multiplying decimals then shows the corresponding math. It uses the strategy of counting decimal places with the understanding of why this works by supporting it with the modeling.
Lesson 8.2 - Represent Division of Decimals and Whole Numbers - This is a longer video if you need a slower paced explanation
Alson Lesson 8.2 - Represent Division of Decimals and Whole Numbers - This is a shorter video over the same lesson.
Also Lesson 8.2 - Represent Division of Decimals and Whole Numbers - This is a shorter video over the same lesson.
A non Go Math video with modeling decimals and whole numbers
Lesson 8.3 - An in depth explanation through the lesson.
Lesson 8.3 - A quicker explanation.
Lesson 8.3 - An even quicker explanation.
This a division of decimals example with a word problem.
This video is shows how to divide decimals by 10's, 100's and 1000's. Also shows how it works on a place value table. Shows how the number increases or decreases around the decimal point. (We often teach kids that decimal point "moves", but in really the numbers moves as they are multiplied or divided, the decimal point is stagnate.)