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せいとへの指示
1) Click 
to begin.
2) Use the 
tool to move the answer into the box.
3) Click 
when you're done.
せんせいメモ（せいとたちには非表示）
Level 4: I can create and solve subtraction word problems, including unknowns. Level 3: I can solve word problems with subtraction, including unknowns, within 20. *I can understand essential vocabulary, such as: Unknown, Subtraction, Solve *I can subtract combinations of numbers within 20. *I can subtract using a number and an unknown within 20. *I can solve word problems within 10 using subtraction strategies.
