Question

Calculati
a) 12 km + 130 hm = ? hm
7 km - 25 dam = ? m
3 dam + 19 m = ? dm
11 hm - 420 m = ? dam
19 m - 30 dm - 400 cm = ? m

b) 8 x 70 dm = ? m
16 km x 3 = ? hm
2 700 dam : 3 = ? dm
(522 km + 6 m) : 2 = ? m
(147 dm + 6 cm) : 9 = ? cm

c) 2 x (9 m + 18 dam) = ? m
d) (18 cm + 19 mm) x 200 = ? m
e) (99 dm + 110 cm) : 20 = ? mm
f) (77 m + 230 dm) 2500 = ? cm

Answer 1

12 km + 130 hm = ? hm

*12 km = 120 hm

120 + 130 = 250 hm
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7 km - 25 dam = ? m

*7 km = 7000 m
* 25 dam = 250 m

7000 - 250 = 6750 m
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3 dam + 19 m = ? dm

* 3 dam=  300 dm
* 19 m = 190 dm

300 + 190 = 490 dm
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11 hm - 420 m = ? dam

*11 hm = 110 dam
* 420 m = 42 dam

110 - 42 = 69 dam
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19 m - 30 dm - 400 cm = ? m

*30 dm = 3 m
400 cm = 4 m

19 - 3 - 4 = 16 - 4 = 12 m
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b) 8 x 70 dm = ? m

*70 dm= 7m

8 x 7 = 56 m
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16 km x 3 = ? hm

*16 km= 160 hm

160 x 3 = 480 hm
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2 700 dam : 3 = ? dm

*2 700 dam = 270000 dm

270 000 : 3 = 90 000 dm
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(522 km + 6 m) : 2 = ? m

*522 km = 522000 m

(522000 + 6) : 2 = 522006: 2 = 261003 m
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(147 dm + 6 cm) : 9 = ? cm

*147 dm = 1470 cm

(1470 + 6) : 9 = 1476 : 9= 164 cm
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c) 2 x (9 m + 18 dam) = ? m

* 18 dam= 180 m

2 x ( 9 + 180 ) = 2 x 189 = 378
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(18 cm + 19 mm) x 200 = ? m

*18 cm= 0,18 m
*19 mm= 0,019 m

(0, 18 + 0,019) x 200 = 0,199 x 200 = 39, 8 m
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(99 dm + 110 cm) : 20 = ? mm

*99 dm= 9900 mm
*110 cm =1100 mm

( 9900 + 1100) : 2 = 11000 : 2 =5500 mm
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(77 m + 230 dm) 2500 = ? cm

*77 m = 7700 cm
*230 dm= 2300 cm

( 7700 + 2300 ) 2500 = 10000 x 2500 = 25000000 cm