口算练习,口算1:,24= 20 4= 200 4= 6 3= 60 3= 600 3= 40 8= 300 6= 20 6=,50 4= 200 3= 400 2= 30 5= 90 7= 50 9= 20 7= 6 50= 500 8=,口算2:,30 8= 40 6 = 80 4 = 60 7 = 90 2 = 70 6 = 100 4 = 70 3 = 200 5 =,口 算3:,300 5 = 200 3 = 503 = 50 4 = 40 5 = 70 4 = 9 60 = 803 = 608 =,口 算4:,将左右两边相等的算式和得数用线连起来。,7008 1200509 56003400 450,307 24006004 40008500 210,
