Step 1 / 1
Plus zero
★★★Zero means none, so adding it changes nothing.
Addition Village · Learn first
Example
Solve it.
0 + 17 = ?
Answer: 17
Adding zero · Numbers & Operations
Adding zero changes nothing: 12 + 0 = 12 and 0 + 15 = 15.
Zero means none, so adding it changes nothing.
This is step 1 of unit 21, “Adding zero”, 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.