发布网友 发布时间:2024-10-21 18:58
共5个回答
热心网友 时间:2024-11-10 14:19
原式=780÷15×51=780×51÷15=[(78×2×5)×(3×17)]/(3×5)=78×2×17=78×(2×17)=78×34=(80-2)×(30+4)=80×30+80×4-2×30-2×4=2400+320-60-8=2652
热心网友 时间:2024-11-10 14:20
[780÷(128-113)]×51
=[780÷15]x51
=[780÷30Ⅹ2]Ⅹ[(51x2)÷2]
=52X[102÷2]
=52x[(100十2)÷2]
=(52X100+52×2)÷2
=5304÷2
=2652
热心网友 时间:2024-11-10 14:20
简便计算
[780÷(128-113)]x51
=[780÷15]x51
=52x51
=52×50+52
=2600+52
=2652
热心网友 时间:2024-11-10 14:21
原式=(780÷15)×51
=52×51
=2652
热心网友 时间:2024-11-10 14:21
[780÷(128-113)]×51
=(780÷15)×51
=52×51
=52×(50+1)
=52×50+52
=2600+52
=2652