About 50 percent of the total number of items administered to third-grade and seventh-grade students dealt with these topics. ... No items on long division or multiplication involved regrouping. ... For the calculation involving four two-digit addends performance was at about the 50-percent level for third grade and at the 80-anbsp;...
Title | : | The Arithmetic Teacher |
Author | : | |
Publisher | : | - 1987 |
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