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2024-10-10 09:59:26
(–57) . (67 – 34) – 67 . (34 –57)
= [(–57) . 67 – (–57 ) . 34] – (67 . 34 – 67 . 57)
= – (57 . 67) – [–(57 . 34)] – (67 . 34 – 67 . 57)
= – 57 . 67 + 57 . 34 – 67 . 34 + 67 . 57
= 67 . 57 – 57. 67 + 57 . 34 – 67 . 34
= 0 + 34 . (57 – 67)
= 34 . (–10) = –340
2024-10-10 09:58:22
(–57) . (67 – 34) – 67 . (34 –57)
= [(–57) . 67 – (–57 ) . 34] – (67 . 34 – 67 . 57)
= – (57 . 67) – [–(57 . 34)] – (67 . 34 – 67 . 57)
= – 57 . 67 + 57 . 34 – 67 . 34 + 67 . 57
= 67 . 57 – 57. 67 + 57 . 34 – 67 . 34
= 0 + 34 . (57 – 67)
= 34 . (–10) = –340
2024-10-10 09:57:05
(37 – 17) . (–5) + 23 . (–13 – 17)
= 20 . (–5) + 23. (–30)
= (–100) + (–690) = –790
2024-10-10 09:56:21
(37 – 17) . (–5) + 23 . (–13 – 17)
= 20 . (–5) + 23. (–30)
= (–100) + (–690) = –790.