Răspuns:
Explicație pas cu pas:
a)
13 dam + 170 dm = ? m; dam > m de 10 ori si dm < m de 10 ori
= 130 m + 17 m =
= 147 m
___________________
9 km + 15 m = ? dm; km > dm de 10 000 de ori si m > dm de 10 ori
= 90 000 dm + 150 dm =
= 90 150 dm
____________________
63 hm - 1 300 cm= ? m; hm > m de 100 de ori si cm < m de 100 de ori
= 6 300 m - 13 m =
= 6 287 m
_____________________
18 dm - 5 cm = ? mm
= 1 800 mm - 50 mm =
= 1 750 mm
_____________________
b)
13 km + 400 dm = ? dam
= 1 300 dam + 4 dam =
= 1 304 dam
____________________
23 hm - 4 000 dm= ? dam
= 230 dam - 40 dam =
= 190 dam
_____________________
63 hm - 1 300 cm = ? m
= 6 300 m - 13 m =
= 6 287 m
___________________
18 dm - 50 cm = ? dm
= 18 dm - 5 dm =
= 13 dm
__________________
c)
570 hm : 3= ? km
= 190 hm = 19 km
______________
64 000 m : 4 = hm
= 16 000 m = 160 hm ; m < hm de 100 de ori ( 16 000 : 100 ) hm
________________
16 km x 3= ? dam
= 48 km = 4 800 dam
_________________
7 cm x 21 = 147 cm = 1 470 mm
________________________
d)
16 x 15 dam = 240 dam = 2 400 m
70 dm : 2 = 35 dm = 3 500 mm
165 000 cm : 3 = 55 000 cm = 55 dam ( cm < dam de 1 000 de ori )
20 000 m : 5 = 4 000 m = 4 km
