第1个回答 2022-07-18
3.5✖️0.7➖1.2✖️0.5
=0.5×7×0.7一1.2×0.5
=0.5×4.9一1.2×0.5
=0.5×（4.9一1.2）
=0.5×3.7
=1.85
第2个回答 2022-07-19
解:原式＝0.5*7*0.7 -1.2*0.5
=0.5*(7*0.7 - 1.2)
=0.5*(4.9 - 1.2)
=0.5 * 3.7
=1.85
第3个回答 2022-07-19
3.5x0.7一1.2ⅹ0.5
=0.5x(4.9一1.7)
=0.5ⅹ3.2
=1.6
第4个回答 2023-08-17
3.5✖️0.7➖1.2✖️0.5
=3.5✖️0.7➖0.6
=3.5*0.6-0.6+3.5*0.1
=0.6*（3.5-1）+0.35
=1.5+0.35
=1.85