prompt: Q: How much is 87 minus 66? A: 
random_counterfactual.prompt: Q: How much is 83 minus 45? A: 
ones_op1_counterfactual.prompt: Q: How much is 87 minus 66? A: 
ones_op2_counterfactual.prompt: Q: How much is 87 minus 61? A: 
tens_op1_counterfactual.prompt: Q: How much is 97 minus 66? A: 
tens_op2_counterfactual.prompt: Q: How much is 87 minus 16? A: 
ones_carry_counterfactual.prompt: Q: How much is 90 minus 69? A: 
tens_carry_counterfactual.prompt: Q: How much is 87 minus 66? A: 