Question

ex 4 va rog muuult
la matemateca

Answer 1

a).54cm si 9mm=540mm+9mm=549mm

7dm si 8cm= 70cm+8cm=78cm=780mm

780-549=231mm

b).0,42m=420mm

29cm si 6mm= 290mm+6mm=296mm

420-296=124mm

Answer 2

a)   x + 54 cm 9 mm = 7 dm 8 cm

54 cm 9 mm = 549 mm

7 dm 8 cm = 700 + 80 = 780 mm

x = 780 mm - 549 mm

x = 231 mm = 23 cm 1 mm

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b) 0,42 m - x = 29 cm 6 mm

x = 0,42 m - 29 cm 6 mm

x = 42 cm - 29 cm 6 mm

x = 420 mm - 296 mm

x = 124 mm = 12 cm 4 mm