二位数减一位数退位减法算式100道PPT
27-8=36-7=45-6=54-3=63-2=72-9=81-4=90-1=109-6=118-7=127-4=136-5=145-8=154-9=1...
27-8=36-7=45-6=54-3=63-2=72-9=81-4=90-1=109-6=118-7=127-4=136-5=145-8=154-9=163-2=172-3=181-6=190-7=209-4=218-5=227-8=236-9=245-2=254-3=263-4=272-5=281-8=290-9=309-6=318-7=327-4=336-5=345-8=354-9=363-2=372-3=381-6=390-7=409-4=418-5=427-8=436-9=445-2=454-3=463-4=472-5=481-8=490-9=509-6=518-7=527-4=536-5=545-8=554-9=563-2=572-3=581-6=590-7=609-4=618-5=627-8=636-9=645-2=654-3=663-4=672-5=681-8=690-9=709-6=718-7=727-4=736-5=745-8=754-9=763-2=772-3=781-6=790-7=809-4=818-5=827-8=836-9=845-2=854-3=863-4=872-5=881-8=890-9=909-6=918-7=927-4=936-5=945-8=954-9=963-2=972-3=981-6=990-7=1009-4=1018-5=