小学一年级速算(视算10以内)

.1 5 + 5 = 21 8 + 2 = 41 7 – 4 = 2 8 – 6 = 22 2 – 2 = 42 6 – 6 = 3 4 – 4 = 23 6 – 6 = 43 5 + 4 = 4 1