Hi, welcome to my blog. This week we have been learning a new strategy in maths. We have been learning how to solve subtraction problems by using rounding and compensating and knowledge about tidy numbers. Here are some examples. i didnt know what on EARTH these meant at the beggining, but now im a master. have you ever done tidy numbers? if not, you should, because i really enjoyed it.
+1
269 - 199 = 269 - 200 +1
=70
+3
337 - 97 = 337 - 100 + 3
= 240
+3
672 - 297 = 672 - 300 + 3
= 575
i also made a google slide about it with some more examples. scroll down to see the link.
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