place value lab · placevaluelab_k2
Placevaluelab: Count And Build
Bundling regroups the tokens. Shifting scales the amount. Figure out which move changes what — then try to make a zero appear.
PredictTestExplainReviseDefendTransfer0/4 evidence steps
hundred-thousands0
ten-thousands0
Same bundle move, different exchange rate. How does the notation change when the rate is not ten? move log
No moves yet — drop tokens, fill a column past nine, then bundle.