# tens ## Grade 1 Math | Counting Tens II (Tens and Ones)

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 1 Math | Counting Tens II (Tens and Ones) ## Grade 1 Math | Counting Tens I (Tens and Ones)

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 1 Math | Counting Tens I (Tens and Ones) ## Grade 1 Math | Subtraction IV (Tens and Ones Missing Minuend/Subtrahend)

Subtraction is an arithmetic operation that represents the operation of removing objects from a collection. The result of a subtraction is called a difference. Subtraction is signified by the minus… Read More »Grade 1 Math | Subtraction IV (Tens and Ones Missing Minuend/Subtrahend) ## Grade 1 Math | Subtraction III (Tens and Ones)

Subtraction is an arithmetic operation that represents the operation of removing objects from a collection. The result of a subtraction is called a difference. Subtraction is signified by the minus… Read More »Grade 1 Math | Subtraction III (Tens and Ones) 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 1 Math | Addition IV (3 Single Digit Number) ## Grade 1 Math | Place Value IV (Round to the Nearest Ten)

Rounding means replacing a number with an approximate value that has a shorter, simpler, or more explicit representation. For example, replacing \$23.4476 with \$23.45, the fraction 312/937 with 1/3, or the expression √2 with… Read More »Grade 1 Math | Place Value IV (Round to the Nearest Ten) ## Grade 1 Math | Place Value III (Tens and Ones)

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 1 Math | Place Value III (Tens and Ones)