1st Grade Common Core Ten More and Ten Less Worksheets (1.NBT.5)
The attachment is a packet of five days of worksheets for first grade common core standard 1.NBT.5 Given a two-digit number, mentally find 10 more or 10 less than the number, without having to
count; explain the reasoning used. There are sections of a hundreds chart, places were students mentally change numbers, adding or taking away ten and a word problem with examples of strategies they can use and an area for them to write their explanation. This will be a great preparation for second grade when they will write how they solve problems. Each day has two worksheets, designed to be copied front and back. The front page focuses on the standard of the week and the back is a review of previous information. They all contain place value review and word problems, including an area to write an equation.
The review concepts this week are:
1.0A.4- Understand subtraction as an unknown-addend problem.
1.NBT.1- Extending a counting sequence up to 120 and read and write numerals.