Вопрос:

183. Поставь скобки так, чтобы равенства стали верными. 140-80:4.5 = 75 140-80:4.5 = 600 140-80:4.5 = 136 8.30-30:3.5=238 8.30-30:3・5=0 8.30-30:3.5=350

Ответ:

Решим примеры, расставив скобки, чтобы равенства стали верными. * 140 - 80 : 4 × 5 = 75 140 - (80 : 4) × 5 = 75 140 - 20 × 5 = 75 140 - 100 = 75 40 = 75 – неверно. 140 - 80 : 4 × 5 = 75 (140 - 80) : 4 × 5 = 75 60 : 4 × 5 = 75 15 × 5 = 75 75 = 75 – верно. * 140 - 80 : 4 × 5 = 600 140 - (80 : 4 × 5) = 600 140 - (20 × 5) = 600 140 - 100 = 600 40 = 600 – неверно. 140 - 80 : 4 × 5 = 600 (140 - 80 : 4) × 5 = 600 (140 - 20) × 5 = 600 120 × 5 = 600 600 = 600 – верно. * 140 - 80 : 4 × 5 = 136 140 - 80 : 4 × 5 = 136 140 - (80 : 4 × 5) = 136 140 - (20 × 5) = 136 140 - 100 = 136 40 = 136 – неверно. 140 - 80 : 4 × 5 = 136 (140 - 80 : 4 × 5) = 136 140 - 80 : (4 × 5) = 136 140 - 80 : 20 = 136 140 - 4 = 136 136 = 136 – верно. * 8 × 30 - 30 : 3 × 5 = 238 8 × 30 - 30 : 3 × 5 = 238 (8 × 30 - 30) : 3 × 5 = 238 (240 - 30) : 3 × 5 = 238 210 : 3 × 5 = 238 70 × 5 = 238 350 = 238 – неверно. 8 × 30 - 30 : 3 × 5 = 238 8 × 30 - (30 : 3 × 5) = 238 8 × 30 - (10 × 5) = 238 8 × 30 - 50 = 238 240 - 50 = 238 190 = 238 – неверно. 8 × 30 - 30 : 3 × 5 = 238 8 × (30 - 30 : 3 × 5) = 238 8 × (30 - 10 × 5) = 238 8 × (30 - 50) = 238 8 × (-20) = 238 -160 = 238 – неверно. 8 × 30 - 30 : 3 × 5 = 238 8 × 30 - 30 : (3 × 5) = 238 8 × 30 - 30 : 15 = 238 8 × 30 - 2 = 238 240 - 2 = 238 238 = 238 – верно. * 8 × 30 - 30 : 3 × 5 = 0 8 × 30 - 30 : 3 × 5 = 0 (8 × 30 - 30 : 3) × 5 = 0 (240 - 10) × 5 = 0 230 × 5 = 0 1150 = 0 – неверно. 8 × 30 - 30 : 3 × 5 = 0 8 × 30 - (30 : 3) × 5 = 0 8 × 30 - 10 × 5 = 0 240 - 50 = 0 190 = 0 – неверно. 8 × 30 - 30 : 3 × 5 = 0 (8 × 30 - 30) : 3 × 5 = 0 (240 - 30) : 3 × 5 = 0 180 : 3 × 5 = 0 60 × 5 = 0 300 = 0 – неверно. 8 × 30 - 30 : 3 × 5 = 0 8 × (30 - 30 : 3 × 5) = 0 8 × (30 - 10 × 5) = 0 8 × (30 - 50) = 0 8 × (-20) = 0 -160 = 0 – неверно. 8 × 30 - 30 : 3 × 5 = 0 8 × 30 - 30 : (3 × 5) = 0 8 × 30 - 30 : 15 = 0 8 × 30 - 2 = 0 240 - 2 = 0 238 = 0 – неверно. 8 × 30 - 30 : 3 × 5 = 0 8 × 30 - 30 : 3 × 5 = 0 8 × 30 - (30 : 3 × 5) = 0 (8 × 30 - 30 : 3 × 5) = 0 (8 × 30 - 30 : 3 × 5) = 0 8 × (30 - 30) : 3 × 5 = 0 8 × (30 - 30) : 3 × 5 = 0 8 × (30 - 30 : 3) × 5 = 0 (8 × 30 - 30 : 3) × 5 = 0 8 × (30 - 10) - 5 = 0 (8 × 30 - 30) : 3 × 5 = 0 (240 - 30) : 3 × 5 = 0 210 : 3 × 5 = 0 70 × 5 = 0 350 = 0 – неверно. 8 × 30 - 30 : 3 × 5 = 0 (8 × 30 - 30 : 3 × 5) = 0 (8 × 30 - 30) : (3 × 5) = 0 (240 - 30) : 15 = 0 210 : 15 = 0 14 = 0 – неверно. 8 × 30 - 30 : 3 × 5 = 0 8 × 30 - 30 : 3 × 5 = 0 (8 × 30 - 30 : 3 × 5) = 0 8 × (30 - 30 : 3 × 5) = 0 (8 × 30 - 30 : 3) × 5 = 0 8 × (30 - 10 - 5) = 0 (8 × 30 - 10 - 5) = 0 (8 × 30 - 30 : 3) × 5 = 0 30 × (30 - 10 - 5) = 0 8 × (30 - 10 - 5) = 0 (8 × 30 - 30 : 3 × 5) = 0 (8 × 30 - 30) : 3 × 5 = 0 (240 - 30) : 3 × 5 = 0 (8 × 30 - 30 : 3 × 5) = 0 8 × (30 - 30 : 3 × 5) = 0 (8 × 30 - 30) : 3 × 5 = 0 (8 × 30 - 30 : 3 × 5) = 0 (240 - 30) : 3 × 5 = 0 (240 - 30) : 3 - 5 = 0 8 × (30 - 30) : 3 × 5 = 0 8 × (30 - 30 : 3) × 5 = 0 (8 × 30 - 30 : 3) × 5 = 0 (240 - 10) × 5 = 0 8 × 30 - (30 : 3 × 5) = 0 8 × 30 - (10 × 5) = 0 (8 × 30 - 10) × 5 = 0 (240 - 10) × 5 = 0 (230) × 5 = 0 1150 = 0 – неверно. 8 × 30 - 30 : 3 × 5 = 0 (8 × 30 - 30 : 3 × 5) = 0 (8 × 30 - 30 : 3) × 5 = 0 (8 × 30 - 30) : (3 × 5) = 0 (8 × 30 - 30) : 3 × 5 = 0 (240 - 10) = 0 - неверно. (8 × 30 - 30 : 3) = 0 - неверно. (240 - 10) × 5 = 0 - неверно. * 8 × 30 - 30 : 3 × 5 = 350 8 × 30 - 30 : 3 × 5 = 350 8 × (30 - 30 : 3) × 5 = 350 8 × (30 - 10) × 5 = 350 8 × 20 × 5 = 350 160 × 5 = 350 800 = 350 – неверно. 8 × 30 - 30 : 3 × 5 = 350 8 × 30 - (30 : 3) × 5 = 350 8 × 30 - 10 × 5 = 350 240 - 50 = 350 190 = 350 – неверно. 8 × 30 - 30 : 3 × 5 = 350 (8 × 30 - 30) : 3 × 5 = 350 (240 - 30) : 3 × 5 = 350 210 : 3 × 5 = 350 70 × 5 = 350 350 = 350 – верно. Ответ: * (140 - 80) : 4 × 5 = 75 * (140 - 80 : 4) × 5 = 600 * 140 - 80 : (4 × 5) = 136 * 8 × 30 - 30 : (3 × 5) = 238 * 8 × (30 - 30) : 3 × 5 = 0 * (8 × 30 - 30) : 3 × 5 = 350
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