如题所述
第1个回答 2020-12-02
302x15一684÷38
=4530-18
=4512
=4530-18
=4512
第2个回答 2020-12-02
302×15-684÷38
=4530-18
=4512
=4530-18
=4512
第3个回答 2020-12-02
=300×15+2×15-18
=4500+(30-18)
=4512
=4500+(30-18)
=4512
第4个回答 2020-12-02
302x15一684÷38
=302x3x5-684÷2÷19
=906x5一342÷19
=4530-18
=4512
=302x3x5-684÷2÷19
=906x5一342÷19
=4530-18
=4512