Fill in the blank.
19 × ( × 26) = (19 × 39) × 26
|
Fill in the blank.
41 + ( + 6) = (41 + 29) + 6
|
Fill in the blank.
33 + (37 + 39) = (33 + 37) +
|
Fill in the blank.
39 × ( × 16) = (39 × 11) × 16
|