prompt: Q: How much is 68 minus 29? A: 
random_counterfactual.prompt: Q: How much is 98 minus 87? A: 
ones_op1_counterfactual.prompt: Q: How much is 69 minus 29? A: 
ones_op2_counterfactual.prompt: Q: How much is 68 minus 26? A: 
tens_op1_counterfactual.prompt: Q: How much is 78 minus 29? A: 
tens_op2_counterfactual.prompt: Q: How much is 68 minus 39? A: 
ones_carry_counterfactual.prompt: Q: How much is 69 minus 20? A: 
tens_carry_counterfactual.prompt: Q: How much is 68 minus 29? A: 