Cogito
Grade 6 Math · Chapter 3 · Lesson 4
Dividing Multi-Digit Numbers
Long division, one place at a time.
10 problems · about 18 minutes · 6.NS.B.2
What this lesson teaches
The child divides multi-digit whole numbers fluently using the standard algorithm.
- Long division handles one place value at a time, left to right.
- What does not divide is carried into the next place.
- Multiply the answer back by the divisor to check.
Warm-Up Review
From earlier lessons. Loosen up before the new work.
3 problemsReview — Common Factors and Common Multiples: Greatest common factor of 16 and 40?
Answer 8
Why 8.
Review — Multiplying and Dividing Decimals: 9 ÷ 0.3 = ?
Answer 30
Why 30.
Review — Dividing a Fraction by a Fraction: 3/4 ÷ 1/12 = ?
Answer 9
Why 9.
Warm Up
Straightforward practice. Get the method working first.
3 problems468 ÷ 18 = ?
Answer 26
Why 26.
144 ÷ 12 = ?
Answer 12
Why A square number.
375 ÷ 15 = ?
Answer 25
Why 15 × 20 = 300.
Build It Up
The same ideas with more to keep track of.
2 problems608 ÷ 16 = ?
Answer 38
Why 16 × 30 = 480.
1050 ÷ 25 = ?
Answer 42
Why 25 × 40 = 1000.
Stretch Yourself
Mixed problems. Work out what kind of question it is before you start.
2 problemsThe Coach Trip: 432 people travel on coaches seating 24 each. How many coaches?
Answer 18
Why 18 coaches.
The Boxes: 936 pencils packed 12 to a box. How many boxes?
Answer 78
Why 78 boxes.