First Grade Common Core Worksheets 1.NBT.5 Mentally Find 10 More and 10 Less
*I have included a printable hundreds board at the end of this packet if you need them for students who are struggling with this concept.
The following attachment is one week of math worksheets, including a quiz for Friday. Each day is designed to be copied front and back; the front page is the focus standard of the week and the back page is review of the previously taught concepts. This week has been designed to fit into the third nine weeks of the yearly progression, but could be used any time after you have taught the review concepts. You could also use the front of the sheets in isolation and use the review pages later, after you have covered those objectives.
The focus concept this week is:
CCSS.Math.Content.1.NBT.C.5 Given a two-digit number, mentally find 10 more or 10 less than the number, without having to count; explain the reasoning used.
The review concepts this week are:
CCSS.Math.Content.1.OA.A.1 Use addition and subtraction within 20 to solve word problems involving situations of adding to, taking from, putting together, taking apart, and comparing, with unknowns in all positions, e.g., by using objects, drawings, and equations with a symbol for the unknown number to represent the problem.1
CCSS.Math.Content.1.NBT.C.4 Add within 100, including adding a two-digit number and a one-digit number, and adding a two-digit number and a multiple of 10, using concrete models or drawings and strategies based on place value, properties of operations, and/or the relationship between addition and subtraction; relate the strategy to a written method and explain the reasoning used. Understand that in adding two-digit numbers, one adds tens and tens, ones and ones; and sometimes it is necessary to compose a ten.
CCSS.Math.Content.1.NBT.B.3 Compare two two-digit numbers based on meanings of the tens and ones digits, recording the results of comparisons with the symbols >, =, and <.
Do you need more practice with this objective? I have another week of worksheets that focuses on this standard and it is also in my 4th Nine Weeks Bundled packet. Thank you!