Weband at least 5 vertical hidden subtraction problems. Use a pencil to show your answers. Tuesday 9 – 24 – 13 On graph paper make a 10 x 5 grid. Then place at least 8 horizontal and/or vertical hidden subtraction problems. Monday 9 – 23 – 13 On graph paper make a 10 x 5 grid. Then place at least 8 horizontal and/or vertical Apply properties of operations as strategies to add and subtract. Understand subtraction as an unknown-addend problem. Relate counting to addition and subtraction. Fluently add and subtract within 20 using mental strategies. Use strategies such as counting on, making ten, decomposing numbers and creating easier or known sums. 1st Grade Games.

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Puzzle Pics Subtraction Facts Math Playground

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