一年级下册数学 1260 道计算 90-9= 24-10-7=46+5= 20+13-9= 8+57= 34+(25+5)= 98-70= 58-(58-8)=65+20= 39+7-20= 25+7= 50-8= 86-5= 4+65=20+67= 42+30= 73-40= 85-7= 8+45= 76-60=65-47= 28+54= 68+29= 92-46= 36+57= 70-25= 35+40= 42+30= 50+21= 35+30= 28-8= 36-20= 37-7= 57+8= 80-60= 7+80= 9+70= 71+9= 48+6= 99-6= 75-5= 39+5= 26-3= 27+6= 54-8= 86-6= 24+3= 76-8= 72-50= 69+30= 90+4= 50-7= 40+58= 96-4= 97-7= 79+0=67+9= 90-6= 50+26= 98-70= 8+40= 62+8= 70-5= 46+4= 12-4= 45-40= 80-30= 25+9= 14-8= 17-9= 72-2= 79-70= 7+63= 90-9= 9+60= 3+50= 26-3= 87+8= 43+30= 48+2= 38+7= 44+5= 20+45= 55+7= 47+30= 53-2=25+8= 50+16= 97-60= 36+7= 92+8= 32+40= 16-4= 75-9= 45+8= 58+20= 62+7= 47-5= 54+4= 98-9= 4+76= 68-7= 73-6= 70-3= 24-10= 48-4= 72-3= 75-20= 75+4= 69+7= 90-8= 42+6= 80+10= 26+9= 86-6= 93-60=39-4= 67-30= 44+30= 71+5= 4+62= 72-8=