Question

31см+5дм=7дм-....дм4см

Answer 1

Ответ:

31 см + 5дм = 7 дм - 1 дм 3 см + 2 дм 4 см

Пошаговое объяснение:

1 дм = 10 см

5 дм = 5 * 10 = 50 см

31 см + 5 дм = 31 см + 50 см = 81 см = 8 дм 1 см

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7 дм - 1 дм 3 см + 2 дм 4 см = 70 см - 13 см + 24 см = 81 см = 8 дм 1 см

Answer 2

To solve the equation, we need to find the value of the missing quantity represented by the dots (...).

Given: 31 cm + 5 dm = 7 dm - ... dm 4 cm

First, we need to convert all the measurements to the same unit to perform the operations. Let's convert everything to centimeters (cm):

1 decimeter (dm) = 10 cm 1 meter (m) = 100 cm

Now, let's convert the measurements:

31 cm + 5 dm = 31 cm + 5 dm * 10 cm/dm = 31 cm + 50 cm = 81 cm

7 dm - ... dm 4 cm = 7 dm * 10 cm/dm - 4 cm = 70 cm - 4 cm = 66 cm

Now, we have the equation in terms of centimeters:

81 cm = 66 cm + ... cm

To find the missing quantity, we need to subtract 66 cm from 81 cm:

81 cm - 66 cm = 15 cm

Therefore, the missing quantity represented by the dots (...) is 15 cm.