La. Admin. Code tit. 28 § CLXXI-703

Current through Register Vol. 50, No. 11, November 20, 2024

Section CLXXI-703 - Numbers and Operations in Base Ten

A. Understand that the three digits of a three-digit number represent amounts of hundreds, tens, and ones; e.g., 706 equals 7 hundreds, 0 tens, and 6 ones. Understand the following as special cases.

1. 100 can be thought of as a bundle of 10 tens, called a "hundred."

2. The numbers 100, 200, 300, 400, 500, 600, 700, 800, 900 refer to 1, 2, 3, 4, 5, 6, 7, 8, or 9 hundreds (and 0 tens and 0 ones).

B. Count within 1000; skip-count by fives, tens, and hundreds.

C. Read and write numbers to 1000 using base-ten numerals, number names, and expanded form.

D. Compare two three-digit numbers based on meanings of the hundreds, tens, and ones digits, using,=, and < symbols to record the results of comparisons.

E. Fluently add and subtract within 100 using strategies based on place value, properties of operations, and/or the relationship between addition and subtraction.

F. Add up to four two-digit numbers using strategies based on place value and properties of operations.

G. Add and subtract within 1000 using concrete models or drawings and strategies based on place value, properties of operations, and/or the relationship between addition and subtraction; justify the reasoning used with a written explanation. Understand that in adding or subtracting three-digit numbers, one adds or subtracts hundreds and hundreds, tens and tens, ones and ones; and sometimes it is necessary to compose or decompose tens or hundreds.

H. Mentally add 10 or 100 to a given number 100-900, and mentally subtract 10 or 100 from a given number 100-900.

I. Explain why addition and subtraction strategies work, using place value and the properties of operations.

La. Admin. Code tit. 28, § CLXXI-703

Promulgated by the Board of Elementary and Secondary Education, LR 421045 (7/1/2016).

AUTHORITY NOTE: Promulgated in accordance with R.S. 17.6, R.S. 17:24.4, and R.S. 17:154.