prompt: Q: How much is 51 minus 21? A: 
random_counterfactual.prompt: Q: How much is 84 minus 60? A: 
ones_op1_counterfactual.prompt: Q: How much is 56 minus 21? A: 
ones_op2_counterfactual.prompt: Q: How much is 51 minus 20? A: 
tens_op1_counterfactual.prompt: Q: How much is 61 minus 21? A: 
tens_op2_counterfactual.prompt: Q: How much is 51 minus 11? A: 
ones_carry_counterfactual.prompt: Q: How much is 50 minus 22? A: 
tens_carry_counterfactual.prompt: Q: How much is 51 minus 21? A: 