40×2=80, 5×80=400, 22×2=44, 300×3=900, 6×800=4800, 500×0=0,
320÷4=80, 3000÷6=500, 800÷8=100, 0+32=32, 99×0+25=25, 70÷7+10=20.
40×2=80, 5×80=400, 22×2=44, 300×3=900, 6×800=4800, 500×0=0,
320÷4=80, 3000÷6=500, 800÷8=100, 0+32=32, 99×0+25=25, 70÷7+10=20.