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Multiplying by Powers of Ten
Students will learn how multiply by powers of ten. Students can break apart the number to multiply easily and then add the number of zeros at the end. Example: 12 x 400 = (12 x 4 x 100)
12 x 4 = 48
then you can add 2 zeros from 100 to get 4,800 -
Multiplying by 2-Digit Numbers
In this lesson, students will learn how to multiply by 2 digit numbers. In 4th grade they learned how to multiply by a single digit number; now they must learn that when you move on to the digit in the tens place, you must add a zero before you continue to multiply. Take a look at the picture for an example. Please click the link for a video to further explain the skill.
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Dividing by Powers of Ten
In this lesson, students will learn that you can divide by powers of ten by taking out factors of ten. For example:
2,500 ÷ 500 (both numbers have 2 zeros in common so you can cross them out)
25 ÷ 5 = 5; therefore 2,500 ÷ 500 = 5 -
Dividing by 2-Digit Numbers
Students will learn how to divide by 2-digit numbers. They will learn how to create a work space to help them with division and how to 'guess good numbers'. The following link is a tutorial on how to divide.
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