三年级数学口算题带答案
123+25=148123-35=88 248+89=337...146-23=123...155×5=775...456-12=38... 456+45=501...546-457=89...45×10=451...564-12=47... 879+54=933...896-546=350...56×12=672....45-5=9... 457+456=913... 7+14=21.....
123+25=148123-35=88 248+89=337...146-23=123...155×5=775...456-12=38... 456+45=501...546-457=89...45×10=451...564-12=47... 879+54=933...896-546=350...56×12=672....45-5=9... 457+456=913... 7+14=21.....