Add four 1-digit numbers - Blocks

• Students will add a two-digit number and a one-digit number using place value strategies.
• Students will apply mental math strategies, including counting on and making ten, to solve problems.
• Students will solve two-digit plus one-digit addition problems with and without regrouping.

These two-digit plus one-digit addition worksheets for 1st grade help students take their addition skills beyond basic facts and into the realm of place value. Students add numbers like 34 + 7 or 52 + 6 using strategies such as counting on, making a ten, and decomposing the one-digit number. Our 1st grade addition worksheets bridge the gap between simple addition facts and full two-digit addition, building the understanding and fluency that 2nd grade math will demand. These worksheets give your child the confidence to tackle bigger numbers one small step at a time.

Use a number line or hundred chart as a visual support when introducing these problems. Have your child start at the two-digit number and count on the one-digit amount, marking each jump. Once they are comfortable counting on, introduce the making-ten strategy: "34 + 7: how many more does 34 need to get to 40? Now add the rest." Mixing visual tools with mental strategies gives children flexible approaches they can apply even when a worksheet is not in front of them.

1.NBT.C.4 requires 1st graders to add a two-digit number and a one-digit number within 100, using concrete models, drawings, and strategies based on place value and the properties of operations. These worksheets build exactly the procedural fluency and conceptual understanding this standard targets.