Ohio Mathematics Academic Content Standards (2001)
Number, Number Sense and Operations Standard
Use place value concepts to represent whole numbers using numerals, words and physical models.
Use place value structure of the base-ten number system to read, write, represent and compare whole numbers and decimals.
Grade Level Indicators (Grade 2)
Use place value concepts to represent, compare and order whole numbers using physical models, numerals and words, with ones, tens and hundreds. For example:
a. Recognize 10 can mean "10 ones" or a single entity (1 ten) through physical models and trading games.
b. Read and write 3-digit numerals (e.g., 243 as two hundred forty three, 24 tens and 3 ones, or 2 hundreds and 43 ones, etc.) and construct models to represent each.
Grade Level Indicators (Grade 3)
Use place value concepts to represent whole numbers and decimals using numerals, words, expanded notation and physical models. For example:
a. Recognize 100 means "10 tens" as well as a single entity (1 hundred) through physical models and trading games.
b. Describe the multiplicative nature of the number system; e.g., the structure of 3205 as 3 x 1000 plus 2 x 100 plus 5 x 1.
c. Model the size of 1000 in multiple ways; e.g., packaging 1000 objects into 10 boxes of 100, modeling a meter with centimeter and decimeter strips, or gathering 1000 pop-can tabs.
d. Explain the concept of tenths and hundredths using physical models, such as metric pieces, base ten blocks, decimal squares or money.
Grade Level Indicators (Grade 4)
Use place value structure of the base-ten number system to read, write, represent and compare whole numbers through millions and decimals through thousandths.
Principles and Standards for School Mathematics
Number and Operations Standard
Understand numbers, ways of representing numbers, relationships among numbers, and number systems
connect number words and numerals to the quantities they represent, using various physical models and representations;
understand the place-value structure of the base-ten number system and be able to represent and compare whole numbers and decimals;