prompt: Q: How much is 21 minus 20? A: 
random_counterfactual.prompt: Q: How much is 60 minus 54? A: 
ones_op1_counterfactual.prompt: Q: How much is 23 minus 20? A: 
ones_op2_counterfactual.prompt: Q: How much is 21 minus 20? A: 
tens_op1_counterfactual.prompt: Q: How much is 31 minus 20? A: 
tens_op2_counterfactual.prompt: Q: How much is 21 minus 10? A: 
ones_carry_counterfactual.prompt: Q: How much is 30 minus 29? A: 
tens_carry_counterfactual.prompt: Q: How much is 21 minus 20? A: 