⑴96-46=
70-30=
68-27=
23+50=
⑵80-8=
45+14=
89-45=
60-32=
⑶42+39=
53+24=
98-76=
70+13=
⑷600+700=
33+26=
56+39=
71+29=
⑸2700-900=
84-38=
51-27=
63-38=
⑹8+19=
34-12=
90-55=
77-7=
⑺38+22=
24-6=
48-19=
68+28=
⑻99-20=
36+46=
70-38=
88-7=
510+260= 870-390= 70+180=
650-290= 420+280= 700-150=
540+280540-280 610-350610-360