3-sinf matematika 8-dars

a) 1 yil = 365 kun 365-248= 117 b) 38-23=15 1:30 8:20 14:45 19:55 6:50 7:10 8:00 12h 45 min 11h 84 min 21h 64 min 12h 24 min 22h 4 min x + 4h 48min = 9h 3min – 1h 58min 1 h = 60 minut 4•60+48=240+48=288 min 9•60+3=540+3=543 min 1•60+58=60+58=118 min x + 288min = 543min – 118min x + 288min = 425min x = 425 min – 288 min x = 137 min x = 2 h 17min 7 h 20 min= 7•60= 420 min 420 min+20 min = 440 min 440 min 2h 56min = 2•60= 120 min 120 min+56 min =176 min 176 min 1h 17 min= 1 h = 60 min 60 min+17 min= …

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