3 tens less than 150 - 150-30=120, 1 hundred less than 520 - 520-100=420, 2 tens less than 130 - 130-20=110, 2 hundreds less than 410 - 410-200=210, 6 tens less than 140 - 140-60=80,

Subtracting Multiples of Hundreds and Tens

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