Question

221 см²- 120 мм²=??? 34 м²- 78 см²=??? 45 дм²- 12 см²=???

Answer 1

Ответ:

221см²-120мм²=22100мм²-120мм²=21980мм                                                                 ²34м²-78см²=340000см²-78см²=339922см²                                                                                                      

45дм²-12см²=4500см²-12см²=4488см²

Answer 2

Ответ:

221 см²- 120 мм²=219 см² 80 мм²

34 м²- 78 см²=33  м² 922 см²

45 дм²- 12 см²=44 дм² 88 см²

Пошаговое объяснение:

Answer 3

To perform these calculations, we need to make sure all the units are in the same measurement system. Let's convert all the measurements to square centimeters (cm²) first, as it is a standard unit for area calculations.

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

1. 221 cm² - 120 mm²: Since 1 centimeter (cm) equals 10 millimeters (mm), we can convert 120 mm² to cm². 120 mm² = 12 cm²

Now, the calculation becomes: 221 cm² - 12 cm² = 209 cm²

2. 34 m² - 78 cm²: Since 1 meter (m) equals 100 centimeters (cm), we can convert 34 m² to cm². 34 m² = 34 * 100 * 100 cm² = 340000 cm²

Now, the calculation becomes: 340000 cm² - 78 cm² = 339922 cm²

3. 45 dm² - 12 cm²: Since 1 decimeter (dm) equals 10 centimeters (cm), we can convert 45 dm² to cm². 45 dm² = 45 * 10 * 10 cm² = 4500 cm²

Now, the calculation becomes: 4500 cm² - 12 cm² = 4488 cm²

So, the results are:

1. 209 cm²
2. 339,922 cm²
3. 4488 cm²