Ответ: 1) 5,7+3,75-5,7+0,25=3,75+0,25=4
2)-40×0,5+8×9-2×8×0,5=-20+72-8=44
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Ответ: 1) 5,7+3,75-5,7+0,25=3,75+0,25=4
2)-40×0,5+8×9-2×8×0,5=-20+72-8=44