700÷70=10, 320÷80=4, 400÷20=20, 420-90=330, 170+320=490,
1000-51=949, 520-260=260, 910-190=720, 5×200=1000, 22×0=0,
280÷4=70, 900÷3=300, 45×20=900, 63÷3=21, 810÷90=9,
260÷10=26, 200÷5=40, 81÷3=27, 55÷11=5, 360÷36=10,
90×90=8100, 0×12=0, 44×2=88, 60×5=300, 90÷30=3,
22÷2=11, 720÷80=9, 540÷90=6, 35×3=105, 10×100=1000,
100-6=94, 506-56=450, 660÷3=220, 450÷9=50, 100×25=2500,
420÷2=210.