溫習(一)
Quiz by Yu Ching Tam
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(37 + 21 ) X 4
39 + 6 X ( 8 + 17)
(37 + 21 ) X 4
39 + 6 X ( 8 + 17)
42 - 3 X (8 - 5)
67 + 3 X 9 - 21
5 X 49 + 18 X 4
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