68-27= 47+51=
38+46=
50-90:3=
(65-60)×8=
24+6×6=



4. Сравни

56-20 ........ 56-2
37+3+8 ........ 37+11
30 см ........ 3дм 3 см
2 дм 9 см ...... 30 см
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