1 直接写出得数。(每题1分,共20分)
812-375= 901-585= 367+169= 368+529=
271+325= 718+393= 700-235= 678-431=
35.1+31.5= 10.2+30.2= 20-17.6= 52.6-32.5=
22.9+47.1= 36.5-22.3= 57.2+45.2= 90.9-33.3=
41.5+41.5= 87.9-54.6= 91.8+36.6= 59.8-38.7=

437 316 536 897
596 1111 465 247
66.6 40.4 2.4 20.1
70 14.2 102.4 57.6
83 33.3 128.4 21.1

2 列竖式计算。(每题3分,共18分)
21.3+57.9= 50-23.8= 8.3+9.9=
60.8-44.9= 55.7+14.3= 10.1-5.7=

竖式略
79.2 26.2 18.2
15.9 70 4.4

3 递等式计算。(每题4分,共12分)
45.8-21.5+48.9 80-(25.3+39.2) 13.7+65.8-18.9

73.2 15.5 60.6