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石籬天主教小學下午校

石籬天主教小學下午校. 四年級上學期 第五課：乘法一. 2. 1 ×2×3= ?. 6. 6. 2×3×1= ?. 6. 6. 3×1×2= ?. 3. 7 × 2 × 5 = 14 × 5 = 70. 7 × 2 × 5 = 7 × 10 = 70. 7 ×2×5 = ?. 7 × 2 × 5 = 35 × 2 = 70. 8×3×5 = ?. 8 × 3 × 5 = 24 × 5 = 120. 8 × 3 × 5 = 8 × 15 = 120. 8 × 3 × 5 = 40 × 3

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石籬天主教小學下午校

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  1. 石籬天主教小學下午校 四年級上學期 第五課：乘法一

  2. 2 1×2×3= ? 6 6 2×3×1= ? 6 6 3×1×2= ? 3

  3. 7 × 2 × 5 =14× 5 =70 7 × 2 × 5 = 7 × 10 = 70 7×2×5 = ? 7× 2 × 5 = 35 × 2 = 70

  4. 8×3×5 = ? 8 × 3 × 5 =24× 5 =120 8 × 3 × 5 = 8 × 15 = 120 8× 3 × 5 = 40 × 3 = 120 5×雙數

  5. 4×5×9 = ? 5×7×2 = ? 5×4×5 = ? 2×9×5 = ? 7×4×5 = ? 4×3×5 = ? 3×2×5 = ? 4×5×9 = ? 5×7×2 = ? 5×4×5 = ? 2×9×5 = ? 7×4×5 = ? 4×3×5 = ? 3×2×5 = ? 心算比賽 180 70 100 90 140 60 30

  6. 7×15×2 = 7×(15×2) = 7×30 = 210 25 ×2×9 = (25 ×2)×9 = 50 ×9 = 450 考考你們!! 5或個位是5×雙數

  7. 體育課時同學進行拋豆袋活動，老師將同學分成5組，每組8人，每人有豆袋2個，問老師要準備豆袋多少個呢?體育課時同學進行拋豆袋活動，老師將同學分成5組，每組8人，每人有豆袋2個，問老師要準備豆袋多少個呢? 老師要準備豆袋： 5×2×8 = 10×8 = 80(個)

  8. 小明每日儲蓄4元，5星期共儲蓄多少元? 5星期共儲蓄： 7×5×4 = 7×20 = 140(元)

  9. 這節課完了! 同學繼續努力!!!

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