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( 280@x3)x4怎么写脱式计算

( 280-40x3)x4 =(280-120)×4 =160×4 =640

200-(76+40x3) =200-(76+120) =200-120-76 =80-76 =4

=75x(1+3) =75x4 =300

=810÷81÷3 =10÷3 =3又3分之1 望采纳

脱式计算就是要求按题中的运算顺序一步一步的计算: 7.8÷(32x3/8÷36) =7.8÷(12÷36) =7.8÷(1/3) =7.8x3 =23.4。

15x397 =15x(400-3) =15x400-15x3 =6000-45 =5955

380+270÷15x3 =380+270÷3÷5x3 =380+90÷5x3 =380+48 =428 祝学习进步。

=2.8×(6.3+3.7) =2.8×10=28

(368+241x3)-46x15脱式计算 (368+241x3)-46x15 =(368+723)-690 =1091-690 =401

8.4÷0.6x3.9 =14×3.9 =54.6

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