Subtracting Zero And Subtracting Orally

When we subtract zero from a number, the number remains unchanged, so $16 - 0$ equals . If a number doesn't change after a subtraction is performed, we must have taken away zero, which means $82 -$ $= 82$. To find what number we started with if we took away zero and got 732, the starting number must be . Similarly, if we see an equation like $\text{\_} - 0 = 6,955$, the missing minuend is simply . Finally, if we start with nothing, we can only take away nothing to end up with nothing, so $0 -$ $= 0$.

We can quickly subtract numbers ending in zeros by focusing on the non-zero parts first. For tens, calculating $80 - 30$ gives us . Moving to hundreds, if we calculate $700 - 300$, we subtract $3$ from $7$ and keep two zeros to get . For thousands, taking $3,000$ away from $8,000$ results in . When dealing with larger two-digit short parts, $27,000 - 17,000$ leaves us with exactly . Similarly, if you have $45,000$ and subtract $4,000$, you are left with . Finally, $16,000 - 11,000$ is easily solved by thinking $16 - 11 = 5$, giving a final answer of .