prompt: Q: What is 91 minus 10? A: 
random_counterfactual.prompt: Q: What is 81 minus 40? A: 
ones_op1_counterfactual.prompt: Q: What is 92 minus 10? A: 
ones_op2_counterfactual.prompt: Q: What is 91 minus 10? A: 
tens_op1_counterfactual.prompt: Q: What is 81 minus 10? A: 
tens_op2_counterfactual.prompt: Q: What is 91 minus 20? A: 
ones_carry_counterfactual.prompt: Q: What is 100 minus 19? A: 
tens_carry_counterfactual.prompt: Q: What is 91 minus 10? A: 