## 5th Grade Videos - Understand the place value system.

Recognize that in a multi-digit number, a digit in one place represents 10 times as much as it represents in the place to its right and 1/10 of what it represents in the place to its left.

Explain patterns in the number of zeros of the product when multiplying a number by powers of 10, and explain patterns in the placement of the decimal point when a decimal is multiplied or divided by a power of 10. Use whole-number exponents to denote powers of 10.

Read, write, and compare decimals to thousandths.

• Read and write decimals to thousandths using base-ten numerals, number names, and expanded form, e.g., 347.392 = 3 x 100 + 4 x 10 + 7 x 1 + 3 x (1/10) + 9 x (1/100) + 2 x (1/1000).
• Compare two decimals to thousandths based on meanings of the digits in each place, using >, =, and < symbols to record the results of comparisons.

Use place value understanding to round decimals to any place.

Screenshot Name / Description Flag? Rating
Khan - Scientific Notation I
First video in a three part series by Sal introducing scientific notation (4:12)
Khan - Scientific Notation 3
Third video in a three part series by Sal introducing scientific notation (6:21)
Khan - Scientific Notation 2
Second video in a three part series by Sal introducing scientific notation (3:59)