三年级脱式计算题一25+72+25 52+18+12 17+34+19= = = = = 37-16+28 65+11-12 56-37+21= = = = = 38-25-11 48-22-21 87-35-49= = = = = 29+67 44+83 31+46= = = = = 35+47 68+90 9+57= = = = = 51+567 497-5 486+9= = = = = 61+12-23 729-8 56+20= = = = =
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