Categories
Lessons
Add multiples of 10 Subtract multiples of 10 Add a one-digit number to a two-digit number without regrouping Subtract a one-digit number from a two-digit number without regrouping Make multiples of 10, adding to multiples of 10 Make multiples of 10, subtracting from multiples of 10 Add by breaking up two-digit numbers using place value Add a one-digit number to a two-digit number with regrouping Subtract a one-digit number from a two-digit number with regrouping Adding two two-digit numbers without regrouping Subtract two two-digit numbers without regrouping Addition and subtraction on a number line (up to two digits) Adding two two-digit numbers with regrouping Subtract two two-digit numbers with regrouping Add three numbers up to two digits each Round to the nearest ten Estimate sums and differences of 2-digit numbers Word problems within 100