Doubles and Near Doubles Within 20

Read the worked example together and point out each step. Ask your child to explain it in their own words before they try the problems. Move from within 20 to within 100 only when the make ten and doubles pages feel easy.

Add within 20 with doubles and near doubles, using dot pictures. Doubles add the same number twice. Near doubles add two numbers that are 1 or 2 apart. The directions on the page read: Read the example. Then, write each double and the total in the boxes. The page opens with a worked example, and the answer key shows every answer.

Yes, both. We made it for 2nd Grade addition, and the page works the same whether it lands on a kitchen table or a center rotation. At home, most families go through it together and talk the answers out loud, and that talking is where most of the learning happens with addition strategies. In class it runs well as independent work while you pull a small group. Print one copy or thirty, whichever the day needs.

Second graders add within 20 with make ten, doubles and near doubles, then add within 100 by breaking numbers into tens and ones, using a hundred chart or a number line, and adding a friendly ten. Each sheet starts with a worked example.

For 47 + 29, add 30 instead of 29 to get 77, then take away the extra 1 to get 76. The sheet shows each step so students can see why the answer is correct.

A child who knows sums to 20 and can add whole tens, like 30 + 20, is ready. Start with the break apart and hundred chart sheets before mental math.

They support 2.OA.B.2 (add within 20 with mental strategies) and 2.NBT.B.5 (add within 100 using place value and the relationship between operations).

Second graders should fluently add within 20 (CCSS 2.OA.B.2) and add within 100 using strategies based on place value and properties of operations (2.NBT.B.5). They also begin adding within 1,000 using models and drawings (2.NBT.B.7).

Regrouping (carrying) is typically introduced mid-year in second grade when students add two-digit numbers that sum to more than 9 in the ones place. Understanding place value is a prerequisite. Use base-ten block worksheets before transitioning to the standard algorithm.

By the end of second grade, students should know all addition facts within 20 from memory (CCSS 2.OA.B.2). That is 100 facts (0+0 through 9+9, plus the commutative pairs). Daily timed practice with addition fact worksheets helps build automaticity.