× 10 -ty Words

-ty means 10

twenty = two tens

20 = 10 + 10

thirty = three tens

30 = 10 + 10 + 10

forty = four tens

40 = 10 + 10 + 10 + 10

fifty = five tens

50 = 10 + 10 + 10 + 10 + 10

sixty = six tens

60 = 6 × 10

seventy = seven tens

70 = 7 × 10

eighty = eight tens

80 = 8 × 10

ninety = nine tens

90 = 9 × 10

A Math Look by Dyscalculia.org

TM