Mathematics MA2019 (2019) Grade: 1  11. Explain that the two digits of a twodigit number represent amounts of tens and ones.
a. Identify a bundle of ten ones as a "ten."
b. Identify the numbers from 11 to 19 as composed of a ten and one, two, three, four, five, six, seven, eight, or nine ones.
c. Identify the numbers 10, 20, 30, 40, 50, 60, 70, 80, 90 as one, two, three, four, five, six, seven, eight, or nine tens (and 0 ones). Unpacked Content
Alabama Alternate Achievement Standards

Mathematics MA2019 (2019) Grade: 1  15. Subtract multiples of 10 from multiples of 10 in the range 1090 (positive or zero differences), 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 to a written method and explain the reasoning used. Unpacked Content
Alabama Alternate Achievement Standards
