25dam\(^2\)7m\(^2\)=.....dam\(^2\)
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![](https://rs.olm.vn/images/avt/0.png?1311)
![](https://rs.olm.vn/images/avt/0.png?1311)
3km\(^2\)=30000dam\(^2\)
30000 dam\(^2\)+25dam\(^2\)= 30025dam\(^2\)
=>3km\(^2\) 25dam\(^2\)=30025 dam\(^2\)
![](https://rs.olm.vn/images/avt/0.png?1311)
\(6434dam^2=64ha3400m^2\)
\(4km^262ha=4620000m^2\)
\(4ha-25dam^2=400dam^2-25dam^2\)
\(=375dam^2\)
![](https://rs.olm.vn/images/avt/0.png?1311)
25dam x 2 = 50dam 48m : 4 = 12m
18hm x 4 = 72hm 84dm : 2 = 42dm
82km x 5 = 410km 66mm : 6 = 11mm
![](https://rs.olm.vn/images/avt/0.png?1311)
25dam + 50dam = 75dam
8dam + 12dam = 20dam
36dam + 18dam = 54dam
45dam – 16dam = 29dam
67 dam – 25dam = 42dam
72dam – 48dam = 24dam.
![](https://rs.olm.vn/images/avt/0.png?1311)
6 dam + 15dam = 21dam 16hm – 9hm = 7hm
52dam + 37dam = 89dam 76dam – 25dam = 51 dam
48dam + 23dam = 71dam 63hm – 18hm = 45hm
![](https://rs.olm.vn/images/avt/0.png?1311)
![](https://rs.olm.vn/images/avt/0.png?1311)
1) 726 000 g
2) 870 dam
3) 250 yến
4) 375 dam
Chuc bn hoc gioi
7 tạ 26 kg = 700026g 9km - 3hm=870 dam
5 tấn : 2 tạ=2,5 yến 4 ha - 25 dam= 15 dam
![](https://rs.olm.vn/images/avt/0.png?1311)
a) 25dam + 42dam = 67dam
83hm – 75hm = 8hm
13km x 5 = 65km
b) 672m + 314m = 986m
475dm – 56dm = 419dm
48cm : 6 = 8cm
\(25dam^27m^2=25,7dam^2\)
\(25\dfrac{7}{100}dam^2\)