A box had 13 crayons. Students used 5 crayons. How many crayons are still in the box?
Reasoning strategy
Start with the total and take away the used amount.
Difficulty Practice Guide
Hard Grade 1 Subtraction Word Problems
This page shows what hard practice should demand for grade 1 subtraction word problems. The goal is not a larger worksheet. The goal is to make the student's reasoning visible enough to choose the next better problem.
What Changes At This Difficulty
Stress-test transfer: multi-step structure, constraints, distractors, or reverse reasoning.
Expected structure: 2-3 step problem solving.
Vocabulary load: medium with minimal distractors.
Reasoning depth: at least 2 relationship layers.
Student Work Signals
A good hard problem should expose the bottleneck
MathRoutine watches for whether the student understood the situation, wrote a useful setup, handled the calculation, and answered the exact question asked.
1
model hidden constraints or changed quantities
2
avoid tempting but incomplete first answers
3
explain why the final answer fits the original context
Sample Problems
There are 11 birds on a fence. Some fly away, and 6 birds stay. How many birds flew away?
Reasoning strategy
Use the final amount to find the missing change: 11 - ? = 6.
Why This Matters
The paid value is diagnosis, not answer lookup
Basic gives repeated targeted practice. Pro becomes useful when the student needs help understanding wording, recovering the setup, or seeing the same misconception return across attempts.
Compare plans