Question

1м-2см, 1 дм-2 см, 1 м +20 см, 1м-2дм,  1дм+2 см, 1дм+4дм.

Answer 1

98см;8см;120см;120см;12см;50см

Answer 2

1м=100 см,
100-2=98 см
1 дм=10 см
10-2=8 см
1м+20 см=100+20=120 см
1 м-2 дм=100-20=80 см=8 дм
1 дм+2 см=100+2=102 см
1дм+4дм=5 дм

Answer 3

1м-2см means 1 meter minus 2 centimeters, which can be simplified to 0.98 meters (since 1 meter is equal to 100 centimeters).

1 дм-2 см means 1 decimeter minus 2 centimeters, which can be simplified to 8 centimeters (since 1 decimeter is equal to 10 centimeters).

1 м + 20 см means 1 meter plus 20 centimeters, which can be simplified to 1.2 meters (since 1 meter is equal to 100 centimeters).

1м-2дм means 1 meter minus 2 decimeters, which can be simplified to 0.8 meters (since 1 decimeter is equal to 0.1 meters).

1дм+2 см means 1 decimeter plus 2 centimeters, which can be simplified to 12 centimeters (since 1 decimeter is equal to 10 centimeters).

1дм+4дм means 1 decimeter plus 4 decimeters, which can be simplified to 50 centimeters (since 1 decimeter is equal to 10 centimeters and 4 decimeters is equal to 40 centimeters, so the total is 50 centimeters).