Question

8м 7 см – 4 м 2 дм 9 см – 2м 38 см =6м 48 см + 9 дм 7 см + 2 м 55 см =​

Answer 1

Ответ:

1)140 см = 1м 40 см = 1м 4 дм

2 )1000 см = 10 м

Пошаговое объяснение:

8м 7 см – 4 м 2 дм 9 см – 2м 38 см =

807-429-238 = 140 см = 1м 40 см = 1м 4 дм

6м 48 см + 9 дм 7 см + 2 м 55 см =​ 648 +97+255 = 1000 см = 10 м

Answer 2

To solve these arithmetic operations with measurements, we need to perform subtraction and addition separately for each unit (meters, decimeters, and centimeters). Let's calculate each operation step by step:

Subtraction:

8m 7cm - 4m 2dm 9cm - 2m 38cm

First, let's convert all the units to centimeters for easier subtraction:

(8m * 100cm/m) + 7cm - (4m * 100cm/m + 2dm * 10cm/dm + 9cm) - (2m * 100cm/m + 38cm)

800cm + 7cm - (400cm + 20cm + 9cm) - (200cm + 38cm)

800cm + 7cm - 429cm - 238cm

800cm - 429cm - 238cm + 7cm

(800cm - 429cm - 238cm) + 7cm

(800 - 429 - 238)cm + 7cm

133cm + 7cm

140cm

Therefore, 8m 7cm - 4m 2dm 9cm - 2m 38cm = 140cm.

Addition:

6m 48cm + 9dm 7cm + 2m 55cm

First, let's convert all the units to centimeters for easier addition:

(6m * 100cm/m + 48cm) + (9dm * 10cm/dm + 7cm) + (2m * 100cm/m + 55cm)

600cm + 48cm + 90cm + 7cm + 200cm + 55cm

(600cm + 200cm) + (48cm + 90cm + 55cm) + 7cm

800cm + 193cm + 7cm

1000cm + 193cm + 7cm

1193cm + 7cm

1200cm

Therefore, 6m 48cm + 9dm 7cm + 2m 55cm = 1200cm.

So the final result is:

8m 7cm - 4m 2dm 9cm - 2m 38cm = 140cm

6m 48cm + 9dm 7cm + 2m 55cm = 1200cm