一年级下册口算试题

74-21= 81-39= 83-53= 50-45= 65-44=
23+75= 28+28= 6+52= 95-89= 46-35=
6+27= 41+50= 76+11= 87+3= 32+20=
62-50= 78-63= 70-43= 68-15= 10+75=
14+24= 88-75= 59+31= 35+42= 14+18=
97-13= 87-2= 63-9= 17+73= 98-17=
20-6= 87-56= 44+37= 27+73= 23-10=
40-29= 28+58= 100-45= 24+62= 96-92=
15-2= 99-75= 21+69= 21+25= 71-2=
82+18= 88-34= 40+48= 49-42= 2+38=
70-15= 70+25= 90+8= 52-41= 46+38=
28+70= 27+47= 52-42= 34+21= 23+9=
73-43= 89-20= 74+15= 72-8= 100-77=
8+9= 86-85= 9+8= 46-21= 45-30=
88-38= 33+5= 1+64= 87-18= 40-2=
45-18= 61-47= 72-48= 14-10= 23-4=
92-6= 62+3= 53+33= 88+5= 86-77=
28+35= 74-68= 43-12= 86-13= 44+56=
48-42= 52+6= 34+21= 52-6= 29+21=
94-15= 73-15= 38-16= 5+74= 42-41=本回答被网友采纳

12+21=33