# Summary of Skills

Age 9-11 - Concept 5: Math

## Unit 1: Place Value: Million to Thousandths

### Math

- Compare and order large numbers
- Compare two decimals to thousandths based on meanings of the digits in each place, using >, =, and < symbols to record the results of comparisons
- Compare two decimals to thousandths based on meanings of the digits in each place, using >, =, and < symbols to record the results of comparisons
- 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
- Read and write decimals to thousandths using base-ten numerals, number names, and expanded form
- Read and write numbers from 1,000,000 to thousandths using base-10 numerals, number names, and expanded form
- Read and write Roman numerals
- Read, write, and compare decimals to thousandths
- Read, write, and compare decimals to thousandths.
- 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
- Use place value understanding to round decimals to any place
- Use whole-number exponents to denote powers of 10

## Unit 2: Four Operations

### Math

- Add and subtract multi-digit numbers
- Add, subtract, multiply, and divide decimals to hundredths
- Find whole-number quotients of whole numbers with up to four-digit dividends and two-digit divisors
- Fluently multiply multi-digit whole numbers using the standard algorithm
- Solve problems
- Use parentheses, brackets, or braces in numerical expressions, and evaluate expressions with these symbols
- Write simple expressions that record calculations with numbers, and interpret numerical expressions without evaluating them