This worksheet gives students an opportunity to apply the concepts of addition and subtraction to add and subtract thousandths less than 10 without regrouping. While adding and subtracting decimals, students use the relationship between addition and subtraction to find the missing number. They do not need to regroup numbers in add and subtract thousandths less than 10 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.