Start or used?

Access

Show, draw, type, sign, use your usual communication or direct an agreeing helper. Choose quiet/private work, switch a route, pause, pass or finish. One useful part is enough. A helper can read the exact words or scribe your choices; supplying an operation, count, regrouping or reason is mathematical help and is named. No speed, neatness, speech, handling or device requirement.

Day

57

Id

H07

Notice

Ordinary optional home practice, not unseen assessment or proof a child actually handled stock. Suggested 5–12 minutes, unpiloted; stop after a useful part.

Numbered moves

1. Read the stated source and choose paper, description or usual communication. Contrast□−4=9 and 13−□=9 first.

2. Try one own way before the grown-up model. Keep your values and unit labels.

3. Grown-up separate practice possibility: Join 26 used and 47 left to get 73 start; check 73−26=47; label start/used/left.

4. Receive one available explanation or check. Ask whether to keep, change, pause or finish; another example is optional.

Purpose

Help a new maker read the missing role.

Routes

1. Instruction

   Contrast□−4=9 and 13−□=9 first.

   Name

   A small beginning

2. Instruction

   Help a new maker read the missing role. Use complete provided source and label the answer unit.

   Name

   Make the useful note

3. Instruction

   Choose a different whole count within 0–200 that keeps the result nonnegative. Restate all conditions and check the new result; the original worked answer cannot fill it.

   Name

   Change one condition

Complete source

An invented label box starts with an unknown count of labels. It uses26 labels and has47 left: □−26=47. Find the start and check it.

Title

Start or used?