..... subtraction when bridging in year 2? I have a very able child who loves to partition everything to add / subtract. This is fine for simple stuff (75+22 or 75-22) but he comes unstuck when it involves bridging (75-28). I've tried getting him to partition a bit (so 75-20 is 25 then take away 8 to get the answer) but he's really struggling. How would you do this? Or shall I just persevere?