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Subtract multiples of 10 from multiples of 10 in the range 10–90

がくねん: 1st Grade, Kindergarten, 2nd Grade

教科: Math

基準: Use place value understanding and properties of operations to add and subtract. (NY-1.NBT.6)

せいとへの指示

1. Listen to the instaraction on each page. 2. Solve it 3. You may record your thinking 4. Submit it to your teacher

せんせいメモ（せいとたちには非表示）

NY-1.NBT.6 "Subtract multiples of 10 from multiples of 10 in the range 10-90 using • concrete models or drawings, and • strategies based on place value, properties of operations, and/or the relationship between addition and subtraction. Relate the strategy used to a written representation and explain the reasoning."

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Subtract multiples of 10 from multiples of 10 in the range 10–90