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Level 4 · Add & Subtract 7, 8 and 9

120 days · 20 days per operation · 6 operations · Days 601–720

The final single-digit addition and subtraction operations
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Level 3 — Add & Subtract 5 and 6 · Days 481–600
Complete Level 3 before starting here
 View Level 3 →
Level 4A+7

Add 7 · Days 601–620

0+7=7 up to 93+7=100 · 20 days · 4 bands

Day 601–620Answers 7→100Print →
Level 4B−7

Take Away 7 · Days 621–640

7−7=0 up to 106−7=99 · 20 days · 4 bands

Day 621–640Answers 0→99Print →
Level 4C+8

Add 8 · Days 641–660

0+8=8 up to 92+8=100 · 20 days · 4 bands

Day 641–660Answers 8→100Print →
Level 4D−8

Take Away 8 · Days 661–680

8−8=0 up to 107−8=99 · 20 days · 4 bands

Day 661–680Answers 0→99Print →
Level 4E+9

Add 9 · Days 681–700

0+9=9 up to 91+9=100 · 20 days · 4 bands

Day 681–700Answers 9→100Print →
Level 4F−9

Take Away 9 · Days 701–720

9−9=0 up to 108−9=99 · 20 days · 4 bands

Day 701–720Answers 0→99Print →
Next: Level 5 — Mixed Speed Drill (Days 721–750) →

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