Question

vă rog e pentru prima oră :139hm+80dam=?37hm+170m=? 68dam+390dm=?7km-28dam=?11hm-420m=dam;108m-52000mm=dm;1dam-28cm=dm;2700dam÷3=m;522hm÷5=dam;8×370dm=m​

Answer 1

Răspuns:

Explicație pas cu pas:

139 hm + 80 dam = 139 hm + 8 hm = 147 hm;   dam < hm de 10 ori

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37 hm + 170 m = 3 700 m + 170 m = 3 870 m;   hm > m de 100 de ori

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68 dam +390 dm = 680 m + 39 m = 719 m

68 dam = ( 68 × 10 ) m = 680 m;  dam > m de 10 ori

390 dm = ( 390 : 10 )dm = 39 m;  dm < m de 10 ori

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7 km - 28 dam = 700 dam - 28 dam = 672 dam;  km > dam de 100 de ori

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11 hm - 420 m = 110 dam - 42 dam = 68 dam

11 hm = ( 11 × 10) dam = 110 dam;  hm > dam de 10 ori

420 m = ( 420 : 10 ) dam = 42 dam;   m < dam de 10 ori

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108 m - 52 000 mm = 1 080 dm - 520 dm = 560 dm

108 m = ( 108 × 10 ) dm = 1080 dm;  m > dm de 10 ori

52 000 mm = ( 52 000 : 100 ) dm = 520 dm;  mm < dm de 100 de ori

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1 dam - 28 cm = 100 dm - 2,8 dm = 97,2 dm

1 dam = ( 1 × 100 ) dm = 100 dm

28 cm = ( 28 : 10 ) dm = 2,8 dm;   cm < dm de 10 ori

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2 700 dam : 3 = 900 dam = 90 m

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522 hm : 5 = 104,4 hm = 1 044 dam

104,4 hm = ( 104,4 × 10 ) dam = 1 044 dam;  hm > dam de 10 ori

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8 × 370 dm = 2 960 dm = 296 m;   dm < m de 10 ori