Grade 1 math

First grade word problems: add to, take from, put together, take apart and compare within 20, with the unknown in any spot, plus stories that add three numbers.

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.

First grade: subtract by finding a missing part, such as 10 − 8 as 8 + ? = 10, and find the missing number in any addition or subtraction sentence.

First grade: the equal sign means 'is the same as.' Check whether number sentences like 7 = 8 − 1 and 4 + 1 = 5 + 2 are true or false, and fill in missing numbers.

First grade: find 10 more or 10 less in your head, add and subtract tens, and add within 100 by adding tens to tens and ones to ones, making a new ten when needed.

First grade counting: count to 120 from any number, read and write the numbers past 100, and count a big group of objects by tens and ones.

First grade place value: see a ten as ten ones, read a two-digit number as tens and ones, and compare two-digit numbers with the symbols >, = and <.

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.

First grade measurement: put three objects in order by length, compare two lengths using a third object, and measure with same-size units laid end to end.

Sort objects into groups, count each group and put the groups in order, then read simple graphs to find the total and how many more or fewer. Grades K–1.

Count the sides and corners of flat shapes, compare flat and solid shapes, build shapes with sticks and clay, and put small shapes together to make bigger ones.

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.