Subtraction of 3-Digit Numbers (Complex mental calculations) 💡 How to Support Your Child Without the Answer Book
* 145 238 576 $\underline-23$ $\underline-15$ $\underline-32$ $\mathbf122$ $\mathbf223$ $\mathbf544$ kumon answer book level b math
Mastering the "carrying" process in addition and the "borrowing" (or regrouping) process in subtraction. kumon answer book level b math
Students learn to add up to 3-digit numbers vertically. A key challenge is performing "carrying" entirely in their heads rather than writing down the carried digit. kumon answer book level b math