Fluently add and subtract within 20 using mental strategies. By end of Grade 2, know from memory all sums of two one-digit numbers.
Related Lessons
2nd Grade
Subtract a 1-Digit from a 2-Digit Number
Lesson 111
Decompose numbers to subtract. Engage in a Number Talk focused on subtraction strategies. Can you solve the problem without pencil and paper? Play a fun subtraction game called "Less than 10".
2nd Grade
Sort and Name Shapes
Lesson 307
Join Mrs. McCartney for some fun with Professor Barble doing a tricky comparison word problem. Next, we are going to explore triangles, quadrilaterals, pentagons, hexagons by sorting and naming a variety of shapes.
