Question

Выполни необходимые вычисления и сравни выражения 436+298 209+395 в каких случаях можно сравнить выражение,не вполняя вычисление?подчеркни эти выражение

Answer 1

436. 209.
+. +
298. > 395
______. ______
734. 604

Answer 2

Comparing Expressions without Calculation

To determine in which cases we can compare the expression 436 + 298 with 209 + 395 without performing the calculation, we need to consider the properties of addition and the values involved.

When comparing expressions, we can consider the following scenarios:

1. Commutative Property: Addition is commutative, which means that changing the order of the numbers being added does not affect the result. Therefore, we can compare the expressions without calculation if the numbers being added are the same, regardless of their order.

2. Associative Property: Addition is associative, which means that changing the grouping of the numbers being added does not affect the result. Therefore, we can compare the expressions without calculation if the numbers being added are the same, regardless of their grouping.

3. Cancellation Property: If there are equal terms on both sides of the addition operator, they can be canceled out. Therefore, we can compare the expressions without calculation if there are equal terms on both sides of the addition operator.

Based on the given expressions 436 + 298 and 209 + 395, let's analyze each scenario:

1. Commutative Property: The numbers being added are different in both expressions, so we cannot compare them without calculation.

2. Associative Property: The numbers being added are different in both expressions, so we cannot compare them without calculation.

3. Cancellation Property: There are no equal terms on both sides of the addition operator in either expression, so we cannot compare them without calculation.

Therefore, in this case, we cannot compare the expressions 436 + 298 and 209 + 395 without performing the calculation.