25 X 4 X 3 = ?, 75, 100, 200, 300, 20 X 5 X 2 = ?, 75, 100, 200, 300, 50 X 2 X 6 = ?, 600, 500, 400, 300, 25 X 5 X 4 = ?, 200, 300, 400, 500, 20 X 7 X 5 = ?, 400, 500, 600, 700, 50 X 9 X 2 = ?, 900, 800, 700, 600, 160 X 25 = ?, 1000, 2000, 3000, 4000, 49 X 5 X 20 = ?, 4800, 4900, 5000, 5100, 13 X 8 X 25 = ?, 2300, 2400, 2500, 2600, 14 X 150 = ?, 2100, 2200, 2300, 2400

四年級乘法巧算

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