3.6÷1.5÷1.3÷1.8×7.5×9.1
题目
3.6÷1.5÷1.3÷1.8×7.5×9.1
巧算
答案
3.6÷1.5÷1.3÷1.8×7.5×9.1
=(3.6÷1.8)×(7.5÷1.5)×(9.1 ÷1.3 )
=2×5×7
=70
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