30×7=210, 40÷2=20, 900×6=5400, 500÷5=100, 200×3=600,
420÷7=60, 80×7=560, 640÷8=80, 100×6=600, 360÷4=90,
300×4=1200, 200÷4=50, 50×6=300, 900÷3=300, 240÷6=40,
5+5=10, 7-7=0, 8+8=16, 6-6=0, 4+4=8.
30×7=210, 40÷2=20, 900×6=5400, 500÷5=100, 200×3=600,
420÷7=60, 80×7=560, 640÷8=80, 100×6=600, 360÷4=90,
300×4=1200, 200÷4=50, 50×6=300, 900÷3=300, 240÷6=40,
5+5=10, 7-7=0, 8+8=16, 6-6=0, 4+4=8.