Commons PH is an online platform for learning. We provide information, tips, and tutorials to help learners, teachers, and parents get the most out of online education.
Addition (usually signified by the plus symbol +) is one of the four basic operations of arithmetic, the other three being subtraction, multiplication and division. The addition of two whole numbers results in the total amount or sum of… Read More »Grade 4 Math | Addition I
The word “rounding” for a numerical value means replacing it by another value that is approximately equal but has a shorter, simpler, or more explicit form. Rounding… Read More »Grade 4 Math | Rounding Number
Normal form (scientific notation) is a way to write very large or very small numbers in a more compact form. It has two parts:
The expanded form of a number writes it as a sum, with each digit makes an individual term multiplied by its place value.Expanded form or expanded notation is a way… Read More »Grade 4 Math | Expanded Form
Positional notation (or place-value notation, or positional numeral system) denotes usually the extension to any base of the Hindu–Arabic numeral system (or decimal system). More generally, a positional system is a numeral system… Read More »Grade 4 Math | Place Value II
Place value is the value of each digit in a number. For example, the 5 in 350 represents 5 tens, or 50; however, the 5… Read More »Grade 4 Math | Place Value
Multiplication (often denoted by the cross symbol ×, by the mid-line dot operator ⋅, by juxtaposition, or, on computers, by an asterisk *) is one of the four elementary mathematical operations of arithmetic, with the other ones… Read More »Grade 6 Math | Multiplication