Grade 2 math

Add and subtract within 20 in your head: count on, turn a sum around, make a ten, use doubles, subtract through ten, and use a fact you know. Grades 1–2.

Grade 2: find the total in an array by adding equal rows or columns, write it as a sum like 4 + 4 + 4, and count the squares in a rectangle cut into rows and columns.

Second grade: tell whether a group of up to 20 objects is odd or even by pairing them or counting by 2s, and write an even number as a double, like 12 = 6 + 6.

Second grade word problems: add and subtract within 100 to solve one-step and two-step problems, using tape diagrams and number sentences with a box for the unknown.

Grade 2: add and subtract within 100 with place value — tens with tens and ones with ones, making a ten, counting up — add up to four numbers, and explain why it works.

Grade 2: add and subtract three-digit numbers — hundreds with hundreds, tens with tens, ones with ones — making or breaking tens and hundreds, and write it in columns.

Second grade: count to 1,000, skip-count by 5s, 10s and 100s from any number, and add or subtract 10 or 100 in your head.

Second grade place value: see a hundred as ten tens, read three-digit numbers as hundreds, tens and ones, write them in words and expanded form, and compare them.

Tell and write time on analog and digital clocks: to the hour and half hour in first grade, to five minutes with a.m. and p.m. in second grade.

Grade 2 money: know pennies, nickels, dimes, quarters and dollar bills, count mixed coins by skip-counting, use the ¢ and dollar signs, and solve money word problems.

Second grade: show numbers as lengths from 0 on a number line, add and subtract with jumps, and solve word problems about lengths in the same unit.

Second grade measurement: measure with rulers and meter sticks, estimate lengths, see why bigger units give smaller numbers, and find how much longer one thing is.

Second grade data: measure objects and show the lengths on a line plot, draw picture graphs and bar graphs with up to four groups, and answer questions from them.

Cut circles and rectangles into two, three or four equal shares, name them halves, thirds and fourths, and see why more shares means smaller shares. Grades 1–2.

Tell what names a shape, like being closed with three sides, from what does not, like color and size; then name quadrilaterals, pentagons, hexagons and cubes.