Step 1 / 3
Joining blanks
★★★Loading…
Join and split · Numbers & Operations
Switch between joining and splitting to see how two parts and a whole belong together.
This is step 1 of unit 16, “Join and split”, in Stage 1: Numbers to 20, adding and subtracting (ages 6–7). A round has 8 problems; 90% or better earns three stars. Everything is free with no sign-up, and your stars and XP are saved on this device.