chapters · 4
01FREE
Numbers Beyond 9,999
The student sees that counting does not stop at 9,999 and that the next number needs a new name and a new place.
9 concepts
→
02PREMIUM
Adding And Taking Away Big Numbers
The student sees that the column method they already use on 4-digit numbers has to stretch to five and six digits, and that the hard parts are carries and borrows.
10 concepts
→03PREMIUM
Multiplying By A Three-digit Number
The student sees that the method they use for a two-digit multiplier has to stretch to three digits, and that the difficulty is where the rows go.
6 concepts
→04PREMIUM
Dividing Bigger Numbers
The student sees that the division they already do with a single-digit divisor has to stretch to two-digit divisors and five-digit dividends.
8 concepts
→