Question

Сравни значения выражений, не проводя вычислений 147+580 и 246+580, 650+178 и 650+180,920 - 180 и 910 - 180,750 - 463 и 750 - 460.

Answer 1

147+580 < 246+580
650+178 < 650+180
920-180 > 910-180
750-463 < 750-460

Answer 2

1)< т.к. 147<246
2)< т.к. 178<180
3)> т.к. 920>910
4)< т.к. вычитаемое больше

Answer 3

To compare the values of the given expressions without performing calculations, we can use basic arithmetic properties:

1. 147 + 580 and 246 + 580: Both expressions have a sum of 580 in common. The first expression starts with 147, while the second one starts with 246. Since 246 is greater than 147, we can deduce that 246 + 580 is greater than 147 + 580 without calculating the exact values.

2. 650 + 178 and 650 + 180: Both expressions have a sum of 650 in common. The first expression adds 178, while the second one adds 180. Since 180 is greater than 178, we can conclude that 650 + 180 is greater than 650 + 178.

3. 920 - 180 and 910 - 180: Both expressions subtract 180 from a number. Since the subtraction is performed on a larger number in the second expression (i.e., 910), we can deduce that 910 - 180 is greater than 920 - 180.

4. 750 - 463 and 750 - 460: Both expressions subtract a number from 750. Since the subtraction is performed on a smaller number in the second expression (i.e., 460), we can conclude that 750 - 460 is greater than 750 - 463.

Based on the comparisons, the expressions in order from greatest to smallest are:

1. 246 + 580
2. 650 + 180
3. 910 - 180
4. 750 - 460