Add/Sub Yr 6 WALT solve subtraction problems by changing one into a tidy number. (numbers >100)

 515-398=

15-98=83 500-300=200+83=283

232-88=

32-88=56+200=256

187-14=

87-14=73 100+73=173

234-52=

34-54=22 200+22=222

136-67=

36-67=31 100+31=131