Use number-line drawings to represent subtraction facts, as: 0 10 L_J-_L-L-J_LJ i --LJ I s 9 - 7 = 2 3. ... Use worksheets of basic subtraction facts and a sandglass timer (an egg timer of hourglass type) on the arithmetic table. 6. Give a sum such anbsp;...

Title | : | Handbook for Exploratory and Systematic Teaching of Elementary School Mathematics |

Author | : | Clark Alan Riedesel, Paul Clay Burns |

Publisher | : | HarperCollins Publishers - 1977-01-01 |

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