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整十数加一位数和整十数,35 + 3 =,65,数学,数学,数学,35+ 3 =,38,共多少本数学书?,（本）,（本）,两种书一共多少本?,32 + 4 =,41 + 6 =,66 + 3 =,5 + 31 =,4 + 82 =,7 + 32 =,63 + 4 =,5 + 74 =,26 + 2 =,6 + 72 =,44 + 3 =,53 + 6 =,36,47,69,36,86,39,67,79,28,78,47,59,51+40 =,30+61 =,44+20 =,40+32 =,50+42 =,60+23 =,30+62 =,21+30 =,20+41 =,40+33 =,36+32 =,62+25 =,91,91,64,72,92,83,92,51,61,73,68,87,哪两个两位数相加等于99?,18+81,27+72,36+63,45+54,两种书一共多少本?,