Question

which division equation matches the visual model?18 ÷ 3 = 515 ÷ 6 = 320 ÷ 6 = 318 ÷ 6 = 3

Explanation:

Step1: Count total number of keys

There are 6 groups, each with 3 keys. Total keys: $6 \times 3 = 18$

Step2: Identify division relationship

Total keys divided by number of groups equals keys per group, or total divided by keys per group equals number of groups. Here, $18 \div 6 = 3$ matches (18 total keys, 6 groups, 3 keys per group).

Step3: Verify options

Check each option:

• $18 \div 3 = 5$: $18\div3=6

eq5$, incorrect.

• $15 \div 6 = 3$: $15\div6=2.5

eq3$, incorrect.

• $20 \div 6 = 3$: $20\div6\approx3.33

eq3$, incorrect.

• $18 \div 6 = 3$: $18\div6=3$, correct.

Answer:

D. 18 ÷ 6 = 3