30×7=210200×3=600100×6=60050×6=300
52×3=1569×102=9187×59=41363×3=189
420÷7=60640÷8=80200÷4=50240÷6=40
454÷9≈50358÷9≈40803÷9≈9071÷7≈10
30×7=210200×3=600100×6=60050×6=300
52×3=1569×102=9187×59=41363×3=189
420÷7=60640÷8=80200÷4=50240÷6=40
454÷9≈50358÷9≈40803÷9≈9071÷7≈10