prettybeesting153 prettybeesting153

16-09-2022
Mathematics

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Which number sentence matches a model with 9 balloons and 9 weights?
Which number sentence matches a model with 9 balloons and 9 weights?

9+0=99 plus 0 is equal to 9

9+(−9)=09 plus negative 9 is equal to 0

9+9=189 plus 9 is equal to 18

−9+(−9)=−18

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