Open Number Line Addition Within 1,000: Write the Equation #1

Practice writing multi-digit addition equations using open number lines with this second-grade math worksheet! This one-page worksheet features open number lines with arrows that represent addition equations within 1,000. Students are asked to use the number lines to write a matching three-digit addition equation, including both addends and the sum.

Number lines offer students a concrete model to help them visualize the addition process. Get more targeted practice with the Open Number Line Addition Within 1,000: Write the Equation #2 worksheet. For related skills practice, check out the Adding Three-Digit Numbers on an Open Number Line #1 worksheet!