Question

【题目】脱式计算。
28×2×5 39×58+58 (76-24)×13 (20+4) × 25

Answer 1

【答案】28×2×5
=56×5
=280
39×58+58
=2262+58
=2320
(76-24)×13
=52×13
=676
(20+4) × 25
=30×25
=750
【解析】
28×2×5
=56×5
=280
39×58+58
=2262+58
=2320
(76-24)×13
=52×13
=676
(20+4) × 25
=30×25
=750