1d +/- (basic)
direct addition
1d +/- (with negatives)
minus-negative addition
1d mul/div (basic)
known multiplication fact
1d mul/div (with negatives)
multiplication then sign
1d mixed 3-term
order before add
1d mixed 3-term (neg)
order before add
1d+2d +/- (basic)
addition train windows
1d+2d +/- (neg)
magnitude then sign
1d x teen mul/div (neg)
multiplication then sign
1d x teen mul/div (mastery)
exact division then sign
Mixed-digit 3-term
order before add
Mixed-digit 3-term (neg)
order before add
2d +/- (basic)
distance subtraction
2d +/- (with negatives)
magnitude then sign
Teen mul/div (basic)
multiplication train
Teen mul/div (neg)
multiplication then sign
2d mixed 3-term
order before add
2d mixed 3-term (neg)
order before add
3d +/- (basic)
addition chunks
3d +/- (with negatives)
magnitude then sign
2d mul/div (basic)
multiplication train
2d mul/div (with negatives)
multiplication then sign
2d+3d mixed 3-term
order before add
2d+3d mixed 3-term (neg)
order before add
4d +/- (basic)
distance subtraction
4d +/- (with negatives)
magnitude then sign
3d mixed 3-term
order before add
3d mixed 3-term (neg)
order before add
4d mixed 3-term (mastery)
order before add
4d mixed 3-term (neg, mastery)
order before add