Math Lesson Grade 1
Use addition and subtraction within 20 to solve word problems involving situations of adding to, taking from, putting together, taking apart, and comparing, with unknowns in all positions, e.g., by using objects, drawings, and equations, with a symbol, for the unknown number to represent the problem.
Size : 28.55 ko
Determine the unknown whole number in an addition or subtraction equation relating three whole numbers.
Size : 29.45 ko
Express the length of an object as a whole number of length units, by laying multiple copies of a shorter object (the length unit) end to end; understand that the length measurement of an object is the number of same-size length units that span it with no gaps or overlaps. Limit to contexts where the object being measured is spanned by a whole number of length units with no gaps or overlaps.
Size : 28.22 ko
Partition circles and rectangles into two and four equal shares, describe the share using the words halves, fourths, and quarters, and use the phrases half of, fourth of, and quarter of. Describe the whole as two of, or four of the shares.
Size : 36.13 ko
Size : 449.35 ko