Starting from 347, what is the next number when skip counting by 100s?
A357 — add 10 to the tens digit
B447 — add 1 to the hundreds digit only
C457 — add 1 to both the hundreds and tens digits
D348 — add 1 to the ones digit
When skip counting by 100s, only the hundreds digit increases by 1. The tens digit (4) and ones digit (7) stay exactly the same. 347 → 447. Adding 100 affects only the hundreds place because 100 is exactly one unit in that column — it does not 'spill over' into the tens or ones.
Question 2 Multiple Choice
A student skip counts by 100s starting at 235 and writes: 235, 345, 455, 565. What error is the student making?
AThe jumps are too small — each should be 200
BThe student is changing the tens and ones digits, which should stay fixed at 35
CThe student skipped a number — 245 should come before 345
DThere is no error — the sequence is correct
When skip counting by 100s, the tens and ones digits never change. The correct sequence is 235, 335, 435, 535. The student is incorrectly incrementing other digits: 35 → 45 → 55 → 65. This is a common confusion — the pattern of changing digits when counting by 10s (which affects only the tens digit) is being misapplied here, where only the hundreds digit should change.
Question 3 True / False
When skip counting by 100s starting from 263, the digits '63' never change throughout the sequence.
TTrue
FFalse
Answer: True
Correct. Adding 100 adds exactly 1 to the hundreds column and nothing to any other column. So 263 → 363 → 463 → 563 → 663 → … The tens digit (6) and ones digit (3) remain fixed throughout. This is a direct consequence of place value: 100 is one unit in the hundreds place only.
Question 4 True / False
Skip counting by 100s is essentially the same as skip counting by 10s, just with bigger numbers.
TTrue
FFalse
Answer: False
While both patterns share the same structure (only one digit changes), they affect different columns. Skip counting by 10s changes the tens digit while the ones digit stays fixed. Skip counting by 100s changes the hundreds digit while both the tens and ones digits stay fixed. They are analogous but not the same — each operates at its own place-value level.
Question 5 Short Answer
When skip counting by 100s starting from 382, which digit changes and which digits stay the same? Why?
Think about your answer, then reveal below.
Model answer: Only the hundreds digit (3) changes: 382, 482, 582, 682 … The tens digit (8) and ones digit (2) stay the same throughout. This is because adding 100 adds exactly 1 unit to the hundreds column. Since 1 hundred does not affect the tens or ones columns at all, those digits remain untouched.
This question targets the core insight: place value means each column is independent. Adding a value that fits entirely in one column only changes that column. Understanding this makes mental math with hundreds (382 + 100 = 482) feel obvious rather than procedural — you are just incrementing one digit.