....................................
............
Răspunsuri la întrebare
ex 3) 390 = 3900 8 = 800
96 = 960 320 = 32000
90 = 900 7 = 700
30 = 30000 1900 = 19
19 = 19000 30700 = 307
12 = 12000 3600 = 36
ex 4) 125m = 1250dm 12500cm 125000mm
12000mm = 12m 120dm 1200cm
7600cm = 76m 760dm 76000mm
ex 5) a) 305m-17000mm+430dm=?m
17000:1000=17m
430:10=43m
305m-17m+43m=331m
288m+43m
331m
b) 600mm-25cm+3m=?cm
600:10=60cm
3m×100=300cm
60cm-25cm+300cm
35cm+300cm
335cm
c) 960cm-6m+58dm-1200mm=?dm
960cm:10=96dm
6m×10=60dm
1200mm:100=12dm
96dm-60dm+58dm-12dm
36dm-58dm-12dm
94dm-12dm
82dm
d) 800m-2700cm-3500dm+7000mm=?m
2700cm:100=27m
3500dm:10=350m
7000dm:1000=7m
800m-27m-350m+7m
773m-350m+7m
423m+7m
430m