a)
9 dam +60 m =.....m
9 dam = 90 m
90 m + 60 m = 150 m
__________________
4 hm+5 dam =.......dam
4 hm = 40 dam
40 dam + 5 dam = 45 dam
____________________
9 hm +63 dam =.......cm
9 hm = 90 000 cm
63 dam = 63 000 cm
90 000 cm + 63 000 cm = 153 000 cm
_____________________________
75 dam +130 km=.....m
75 dam = 750 m
130 km = 130 000 m
750 m + 130 000 m = 130 750 m
_________________________
430 m+60 m =....dam
430 m + 60 m = 490 m = 49 dam
_________________________
b)
72 dam -140 m=.......m
72 dam = 720 m
720 m - 140 m = 580 m
_____________________
9 km -9 hm =......dam
9 km = 900 dam
9 hm = 90 dam
900 dam - 90 dam = 810 dam
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1 870 dam - 21 hm=.....hm
1 870 dam = 187 hm
187 hm - 21 hm = 166 hm
______________________
630 cm -120 mm=....mm
630 cm = 6 300 mm
6 300 mm - 120 mm = 6 180 mm
________________________
570 m -1 600 dm=.....cm
570 m = 57 000 cm
1 600 dm = 16 000 cm
57 000 cm - 16 000 cm = 41 000 cm
_____________________________
21 km -18 dam =.....dm
21 km = 210 000 dm
18 dam = 1 800 dm
210 000 dm - 1 800 dm = 208 200 dm
