用“四五二十”这句口诀写出2道乘法算式和2道除法算式______________ ______________ ________________ _________________
用“四五二十”这句口诀写出2道乘法算式和2道除法算式______________ ______________ ________________ _________________
0.54
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用“四五二十”这句口诀写出2道乘法算式和2道除法算式______________ ______________ ________________ _________________
0.54