Adding four-digit numbers No.1

Addition of four-digit numbers (with regrouping) - no.3

Addition of four-digit numbers (with regrouping) - no.1

Addition of four-digit numbers (with regrouping ) - no.7

Addition of four-digit numbers (with regrouping ) - no.6

Four-digit long addition No.1

Four-digit addition and subtraction No.2

Addition of five-digit numbers (with regrouping) - no.4

Addition of four-digit numbers (with regrouping) - no.4

Addition of four-digit numbers (multi-addends ) - no.1

Addition of five-digit numbers (with regrouping ) - no.6