Day 15 (Preparation: Teach or review short method of multiplying by 10.)

• Go to the board.
• Multiply by ten. 75 155 250 2 500 17.9 26.7 27.89 156.9876
• Divide by short division. Start with 240; divide by 2 and keep dividing the answer until it can’t go evenly any more.
• Repeat, starting with 1 000.
• Repeat, starting with 1 400.
• Thanks. You may sit down again.

Day 16

• Go to the board.
• Multiply by ten. 35 127 360 7.350 27.2 39.6 49.89 257.3694
• Divide by short division. Start with 650; divide by 2 and keep dividing the answer until it can’t go evenly any more.
• Repeat, starting with 96.
• Repeat, starting with 84.
• Thanks. You may sit down again.

Day 17 (Preparation: Teach or review short method of dividing by 10.)

• Multiply by ten. 46777 365 5 600 26.9 179.2 139.89 1256.3742
• Divide by ten. 30 120 50 100 900
• Thanks. You may sit down again

Day 18

• Multiply by ten. 29760 127.3 130.35 127.96 3.7524
• Divide by ten. 10 25 100 120 30.1 25.20
• Thanks. You may sit down again.

Following Days

Many days of board work follow this pattern—multiplying and dividing by 100; short and long division, finding factors, and so on. Working at the board is a way to review, practice and consolidate work presented in tests and lessons.