K-4 Mathematics Resources for Parents/Guardians

Standard code and description: 1.NR.1.2; Explain that the two digits of a two digit number represent the amounts of tens and ones.

Students will need to be able to identify which part of a two digit number is the tens and which digit of a two digit number is the ones. For example, in the number 93 there are nine tens and three ones.

Standard code and description: 1.NR.1.3; Compare and order whole numbers up to 100 using concrete models, drawings, and the symbols >, =, and <.

Students will need to be able to take a given set of numbers and put them in order from least to greatest or greatest to least. In order to do this, students must be able to identify the tens and ones places in given numbers to then be able to correctly order each of the numbers.

Standard code and description: 1.NR.5.2; Given a two digit number, mentally find ten more or ten less than the number, without having to count; explain the reasoning used.

Students will need to be able to find ten more or ten less than any given two digit number. It is important that your student is able to do this without counting up or down by ten individual ones. Students must also be able to explain their reasoning. For example, students should be able to say that 45 is ten more than 35 without counting, and 25 is ten less than 35 without counting.