脱式计算. 772-317+128-283 |
(
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4.6×
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(3618÷18-145)×20 | 120÷[45×(1-
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(1)772-317+128-283, =772+128-(317+283), =900-600, =300, (2)(
=
=
(3)4.6×
=(4.6+8.4-5)×
=8×
=11, |
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(4)(3618÷18-145)×20, =(201-145)×20, =56×20, =1120, (5)120÷[45×(1-
=120÷[45×
=120÷5, =24, (6)
=
=
=
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