用自己喜欢的方式计算下面各题(要写出主要的解答过程)(1)3600-800÷40×35(2)64-15.8-14.2(3) (5
用自己喜欢的方式计算下面各题(要写出主要的解答过程)(1)3600-800÷40×35(2)64-15.8-14.2(3)(56×57-27)×913(4)(512-16...
用自己喜欢的方式计算下面各题(要写出主要的解答过程)(1)3600-800÷40×35(2)64-15.8-14.2(3) (56× 5 7 -27)× 9 13 (4) ( 5 12 - 1 6 + 7 18 )×36 (5) 18× 9 14 -5× 9 14 + 9 14 (6)38÷[2.5×(4.36+3.64)].
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(1)3600-800÷40×35, =3600-20×35, =3600-700, =2900; (2)64-15.8-14.2, =64-(15.8+14.2), =64-30, =34; (3) (56×
=(40-27)×
=13×
=9; (4) (
=
=15-6+14, =9+14, =23; (5) 18×
=(18-5+1)×
=14×
=9; (6)38÷[2.5×(4.36+3.64)], =38÷[2.5×8], =38÷20, =1.9. |
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