Add and Subtract 4-Digit and 3-Digit Numbers without Regrouping: Missing Numbers Worksheet

Challenge your young math wizards to solve this add and subtract 4-digit and 3-digit numbers without regrouping worksheet. In each problem, the numbers are laid out in the horizontal format. Students should try to use different strategies involving composing and decomposing numbers to solve these problems. This will help them develop flexibility and fluency.