Multi-Digit Addition and Subtraction Strategies

Features exercises on estimating sums and differences of large numbers and writing the missing digit for estimated equations.

Focuses on mental math strategies, including the break apart strategy, the make a ten strategy, and mental addition and subtraction.

Covers adding and subtracting four-digit numbers, estimating to check, and finding missing digits in multi-digit equations.

Explores subtracting across zeros, estimating to check, comparing differences, and a mixed review of addition.

Asks students to choose a method to find sums and differences of large numbers, compare equations, and find missing digits.