Convert between numbers, word form, and expanded form for multi-digit numbers. Compare them too.
Watch these Khan Academy videos:
Do these Khan Academy exercises:
Next, give your students these challenges:
- 2020 Math Kangaroo Levels 1-2 Problem #21 by STEM4all
- Halving by NRICH
Conclude by leading this investigation:
Taipei 101 Foundations (multiplication, proof)
by MathPickle
4.NBT.A.2: Read and write multi-digit whole numbers using base-ten numerals, number names, and expanded form. Compare two multi-digit numbers based on meanings of the digits in each place, using >, =, and < symbols to record the results of comparisons.