Oliver has gathered 672 sunflower seeds for the trail birds.
"I wish to fill 3 feeders equally," he says, tapping his notebook.
"But 672 is a large number to share one seed at a time."
Bennie rubs his chin. "Then let us share it in big parts."
"First we share 600. Then 60. Then the last 12."
Oliver nods with approval. "Hundreds, then tens, then ones. Very orderly."
Together they write each part on a long strip of bark.
Split 672 into parts that 3 can share evenly: 600, 60 and 12.
| ÷ | 600 | 60 | 12 |
|---|---|---|---|
| 3 | 200 | 20 | 4 |
600 ÷ 3 = 200.
60 ÷ 3 = 20.
12 ÷ 3 = 4.
Add the partial quotients: 200 + 20 + 4 = 224.
Check with multiplication: 3 × 224 = 672.
For 457 ÷ 3, split 457 into 300, 150 and 6. One is left over.
| ÷ | 300 | 150 | 6 |
|---|---|---|---|
| 3 | 100 | 50 | 2 |
Add the partial quotients: 100 + 50 + 2 = 152.
So 457 ÷ 3 = 152 R 1. Check: 3 × 152 + 1 = 457.
| Check with multiplication | True or false? |
|---|---|
| 3 × 224 = 672 | ? |
| 4 × 212 = 846 | ? |
| 6 × 156 = 936 | ? |
| 5 × 115 = 585 | ? |
Very orderly work! Tomorrow we divide numbers with four digits.