prompt: Q: What is 91 minus 51? A: 
random_counterfactual.prompt: Q: What is 30 minus 20? A: 
ones_op1_counterfactual.prompt: Q: What is 93 minus 51? A: 
ones_op2_counterfactual.prompt: Q: What is 91 minus 50? A: 
tens_op1_counterfactual.prompt: Q: What is 71 minus 51? A: 
tens_op2_counterfactual.prompt: Q: What is 91 minus 41? A: 
ones_carry_counterfactual.prompt: Q: What is 91 minus 57? A: 
tens_carry_counterfactual.prompt: Q: What is 91 minus 51? A: 