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

293-88

+2 on both so that makes it 295 and 90

so 90-95=5 so 200+5=205

431-99

+1 on both so that makes it 432 and 100

so 400-132=332

188-32

+2 on both so that makes it 190 and 34

so 190-34=156

235-89

+1 on both so that makes it 236 and 90

so 236-90=254

225-77

+3 on both so that makes it 228 80

so 225=80=245