Building the "math brain" so students can solve problems without counting on their fingers. Why You Need the Kumon Answer Book Level B
For Level B, many errors happen in borrowing (e.g., 62 - 39). If the child redoes it and still gets it wrong, sit with them. Look at the answer book. Say, "According to the book, the answer is 23. Let's count backwards from 62... 61, 60... No. Let's subtract the ones: 2 minus 9... we cannot. So we borrow." Use the answer as the destination , but walk them through the path . kumon answer book level b math
A student sees 400 minus something. They try to borrow from the tens, but the tens is zero. Teach the "Neighbor" rhyme. "If you try to borrow and neighbor is zero, go next door to the four-zero-zero." Break it down visually: 400 = 399 + 1. Subtract 123 from 399 (easy) then add back the 1. Building the "math brain" so students can solve