四年级数学竖式计算并验算60题
12.65+3.5= 85.6-3.21= 12.65+3.5= 55.6-5.75=
85.6-3.21= 12.65+7.5= 83.6-4.35= 32.7+7.52=
12.65+7.5= 83.6-4.35= 32.7+7.52= 55.6-5.75=
209×43= 8652÷36 = 209×43 = 8652÷36=