第1个回答 2020-04-22
列式计算
5400-2940÷28x12
=5400-105x12
=5400-100x12-5x12
=5400-1200-60
=4200-60
=4140本回答被网友采纳
第2个回答 2020-04-22
5400-2940/28×21
=5400-/105×7×4
×1/(4×7)×21
=5400-105×21
=5400-2205
=3195
第3个回答 2023-03-09
5400-2940÷28×21
=5400-2940×3×7÷4÷7
=5400-2940÷4×3
=5400-735×3
=5400-2205
=3195本回答被网友采纳