A. 64 dm + 250 mm = ... Cm B. 11 dam - 350 dm= .... Mm C. 7km - 15 - 10 dm = .... Dam

A. 64 dm + 250 mm =....cm
64 dm = 640cm
250 mm = 25 cm
640cm + 250 cm =890 cm
B. 11 dam - 350 dm = ....mm
11 dam = 110000 mm
350 dm = 35000 mm
110000-35000 = 75000mm
C. 7km - 15hm - 10dm = .... dam
7km = 700dam
15hm = 150dam
10dm = 0.1 dam
700dam - 150dam - 0.1dam = 549.9dam

A.
64 dm + 25 mm = ..... cm
= (64 × 10) + (25 : 10)
= 640 + 2,5
= 642,5 cm

B.
11 dam - 350 dm = ..... mm
= (11 × 10.000) - (350 × 100)
= 110.000 - 35.000
= 75.000 mm

C.
7 km - 15hm - 10 dm = ..... dam
= (7 × 100) - (15 × 10) - (10 : 100)
= 700 - 150 - 0,1
= 549,9


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