Question

Calculati: a)2•13 cm+5•6 cm+123 cm=...cm
B) 10 •153dm+1400000 mm ÷100=...m
C)1,2km-2,8dam=...cm
D)5000mm+1200cm-70dm=...m
E)43000mm-210dm=...m
F)5900cm-14m-3000mm=...m
G)4•10 la puterea 6cm -18hm=...km

Answer 1

Răspuns:

Explicație pas cu pas:

a)  2 × 13 cm + 5 × 6 cm + 123 cm = 26 cm + 30 cm + 123 cm = 179 cm

b)  10 × 153 dm + 1 400 000 mm : 100 = 153 m + 14 000 mm =

= 153 m + 14 m = 167 m

c)  1,2 km - 2,8 dam = (1,2×100) dam - 2,8 dam = 120 dam - 2,8 dam =

= 117,2 dam = ( 117,2 × 1000 ) cm = 117 200 cm

d)  5000 mm + 1 200 cm - 70 dm = 5 m + 12 m - 7 m = 17 m -7 m = 10 m

e)  43 000 mm - 210 dm = 43 m - 21 m = 22 m

f)   5 900 cm - 14 m - 3 000 mm = 59 m - 14 m - 3 m = 45 m - 3 m = 42 m

g)  4 × 10⁶ cm - 18 hm = ( 4 x 10⁶ : 10⁵) km - (18 : 10) km = 40 km - 1,8 km =

= 38,2 km