prompt: Q: How much is 21 minus 16? A: 
random_counterfactual.prompt: Q: How much is 95 minus 50? A: 
ones_op1_counterfactual.prompt: Q: How much is 28 minus 16? A: 
ones_op2_counterfactual.prompt: Q: How much is 21 minus 10? A: 
tens_op1_counterfactual.prompt: Q: How much is 31 minus 16? A: 
tens_op2_counterfactual.prompt: Q: How much is 21 minus 16? A: 
ones_carry_counterfactual.prompt: Q: How much is 28 minus 13? A: 
tens_carry_counterfactual.prompt: Q: How much is 21 minus 16? A: 