As we are just beginning this unit, we are reviewing the first three place value units: ones, tens, hundreds. In the next few sessions we will begin to work more flexibly with these numbers, learning, for example, to express the number 127 as 12 tens and 7 ones.
Today students counted, estimated, and compared quantities of beans in order to develop place value counting skills. Each student first tried to scoop 50 beans, counted them, and then determined "how many more" or "how many fewer" beans would be needed to make 50 exactly. Students then worked in pairs, combining their beans and worked to find "how many more" or "how many fewer" beans would be needed to make 100 exactly. As we are just beginning this unit, we are reviewing the first three place value units: ones, tens, hundreds. In the next few sessions we will begin to work more flexibly with these numbers, learning, for example, to express the number 127 as 12 tens and 7 ones.
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