4×括号3.9-5.7括号加3.6怎样简便计算

Question

4×括号3.9-5.7括号加3.6怎样简便计算

Answer 1

4×（9.3-5.7）+3.6
=4x3.6+3.6
=（4+1）x3.6
=5x3.6
=18
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