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2. Calculează:
a) 180 dam + 320 dam = ? m b) 4 m + 32 dm = ? dm,
1 000 m - 50 dam = ? dam, 42 m - 30 dm = ? m,
6 x 250 dam = ? dam = ? hm, 6x 220 dm = ? dm = ? m,
c) 17 dm + 19 cm = ? cm,
415 dm - 70 cm = ? dm
80 mm : 2 = ?)mm = ?)m.
NSTRUMENTE


Răspuns :

Răspuns:

a) 5000m

b)72 dm ; 50 dam ; 39 m ; 1500 dam= 150 hm ; 1320 dm= 132 m

c)189 cm ; 408 dm ; 40mm=0,04 m

Explicație pas cu pas:

a)180 dam +320 dam = 500 dam = 5000m

b) 4m =40 dm, 40 dm+ 32 dm= 72 dm; 1000m = 100 dam, 100 dam- 50 dam= 50 dam; 30 dm= 3 m, 42m - 3m = 39 m; 1500 dam= 150 hm; 1320 dm = 132 m

c) 17 dm = 170 cm, 170 cm+19 cm = 189 cm; 70 cm= 7 dm, 415 dm - 7 dm= 408 dm;

80 mm :2 = 40 mm= 0,04 m

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