Early Additive Part-Whole
To round 3 digit numbers to the nearest 10 or 100.
Advanced Additive
To round whole numbers to the nearest 10, 100, 1000.
To round decimals to the nearest whole number.
Advanced Multiplicative Part-Whole
To round whole numbers and decimals to nearest 1 or 1/10.
Advanced Proportional Part-Whole
To round decimals to the nearest 100, 10, 1, 0.1 or 0.01.