一、直接写出得数。
① $3.4+5.2=$
② $0.1+0.7=$
③ $16.3+2.1=$
④ $8.5-4.2=$
⑤ $0.9-0.5=$
⑥ $20.2+3.5=$
⑦ $19.6-7.3=$
⑧ $4.1+13.2=$
⑨ $7.2-2.1=$
⑩ $0.6+4.1=$
⑪ $12.1+5.4=$
⑫ $9.8-3.4=$
⑬ $0.3+0.5=$
⑭ $25.4-12.1=$
⑮ $6.5+10.1=$
⑯ $11.8-1.3=$
⑰ $0.7-0.2=$
⑱ $8.3+0.4=$
⑲ $28.7-18.6=$
⑳ $13.5+2.2=$
㉑ $0.8+2.1=$
㉒ $14.3+3.1=$
㉓ $6.7-3.2=$
㉔ $0.4+0.3=$
㉕ $21.6-10.5=$
㉖ $1.2+17.1=$
㉗ $16.4-4.2=$
㉘ $0.2+5.3=$
㉙ $8.1+11.7=$
㉚ $24.3-13.1=$

① 8.6
② 0.8
③ 18.4
④ 4.3
⑤ 0.4
⑥ 23.7
⑦ 12.3
⑧ 17.3
⑨ 5.1
⑩ 4.7
⑪ 17.5
⑫ 6.4
⑬ 0.8
⑭ 13.3
⑮ 16.6
⑯ 10.5
⑰ 0.5
⑱ 8.7
⑲ 10.1
⑳ 15.7
㉑ 2.9
㉒ 17.4
㉓ 3.5
㉔ 0.7
㉕ 11.1
㉖ 18.3
㉗ 12.2
㉘ 5.5
㉙ 19.8
㉚ 11.2

二、列竖式计算。
749÷7=
306÷6=
486÷3=
720÷4=
803÷5=
620÷3=

竖式略 107 51 162 180 160……3 206……2