Addition facts to 20
Doubles, near doubles, and sums that cross ten, with a key that spots the rounding shortcut left unfinished.
Worksheets · K to grade 5
A sheet to print, and a key that says what went wrong.
Twenty problems a sheet, a new sheet every day, made by the same problem makers the app plays. The key does not just mark: for every problem it lists the answers the common mistakes produce, so a wrong answer names its rule.
Two-digit subtraction with regrouping
Twenty take-aways, most of them needing a ten opened, with an answer key that names the mistake.
Three-digit subtraction with regrouping
Borrowing in the ones, the tens, both, and across a zero, with the key that tells the five zero mistakes apart.
Addition with regrouping
Two- and three-digit sums that carry, with a key that says whether the ten was forgotten, written in, or carried to the wrong column.
Hundreds, tens and ones
Write the number from its parts, including parts that are not tidy: 4 hundreds, 12 tens, 3 ones.
Comparing numbers and decimals
Three-digit pairs and decimal pairs, with the key that catches comparing by the ones digit or by how long the number looks.
Multiplication facts
Twenty facts from the twos to the nines, weighted toward the hard end of the table.
Rounding to the nearest ten and hundred
Ten to the nearest ten, ten to the nearest hundred, with midpoints, and a key that names the two ways rounding goes wrong.
Division facts and remainders
Ten facts, then two-digit quotients with remainders, including the ones with a zero in the middle of the answer.
Multi-digit multiplication
Two- and three-digit numbers times one digit, then two digits times two digits, with a key that names the missing row.
More sheets follow the guides: carrying, times tables, place value, rounding. Want one first? Tell us.