prompt: Q: How much is 40 minus 39? A: 
random_counterfactual.prompt: Q: How much is 41 minus 12? A: 
ones_op1_counterfactual.prompt: Q: How much is 49 minus 39? A: 
ones_op2_counterfactual.prompt: Q: How much is 40 minus 30? A: 
tens_op1_counterfactual.prompt: Q: How much is 70 minus 39? A: 
tens_op2_counterfactual.prompt: Q: How much is 40 minus 19? A: 
ones_carry_counterfactual.prompt: Q: How much is 47 minus 36? A: 
tens_carry_counterfactual.prompt: Q: How much is 40 minus 39? A: 