小学一年级数学(下)口算题(四) 82-15= 62+4= 41+44= 34+41= 4+70= 73-10= 80-9= 79-15= 89-68= 38-26= 73+1= 90-47= 42+12= 61+17= 59-9= 49+6= 61-14= 57-55= 46-17= 51-25= 51-40= 81-2= 35+17= 49-43= 31+67= 78+14= 84-11= 51-50= 98-16= 28-18= 88-28= 32+53= 8+63= 99-67= 15+72= 79+6= 35-12= 3+83= 87+11= 33+54= 2-2= 16+38= 98-2= 48-25= 87+10= 83-54= 99-80= 58+27= 96-26= 6+86= 45+9= 16+48= 71+4= 80-19= 45-33= 50-16= 18-7= 91-29= 43+27= 64-46= 31+20= 39+28= 49-21= 40+42= 93-40= 58-27= 37+45= 87+12= 47-23= 67-10= 31+67= 37+25= 64+21= 27-5= 55+11= 31+24= 23+67= 77-52= 7+83= 43-6= 57+9= 68-16= 96-9= 70-44= 26+35= 40-18= 85-44= 28-26= 99-61= 76-3= 67-41= 73+14= 61-49= 37+14= 43-21= 49+18= 34-18= 82-77= 92-32= 19+49=
