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67+97=164.Some strategies you can use to solve this on paper or in your head can be to do+60+90=? then do 7+7=? then add the answers to both.Another strategy is to do 70+100=70,but since you added 3 to each number to make them an even number,you must minus 6 from 170,so 170-6.

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Cwuka

Lvl 5
4y ago

What else can I help you with?