2-sinf.178-bet

matematika 2-sinf mustaqil ishni tekshirish: 178-bet. 17-misol 17 hisoblaymiz. (178-bet) 21 40 96 50 13 80 21 40 + - + + 61 61 46 93 96 50 - 13 80 + 46 93 18. hisoblaymiz. so‘roqlar o‘rniga mos sonlarni qo‘yamiz. 12 7 16 8 27 23 = = = = = = - + x x + + - + + + + - ? ? 2 6 9 7 ? 8 5 4 1 3 19 jadvalni to‘ldiramiz. ifoda rost yolg‘on 3 · 9 + 13 = 40 25 : 5 · 10 = 40 + + 19 jadvalni to‘ldiramiz. ifoda rost yolg‘on (70-20):10=50 20+8·10=100 + + 20 12 59 23 66 + 30 98 54 72 + …

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