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20 doubling whole numbers questions and answers. Ideal starter; mental math. Aligned with Common Core State Standards: 3.NBT.2, Number and Operations in Base Ten; 4.NBT.4, Number and Operations in Base Ten.
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20 doubling whole numbers questions and answers. Ideal starter; mental math. Aligned with Common Core State Standards: 3.NBT.2, Number and Operations in Base Ten; 4.NBT.4, Number and Operations in Base Ten.