①196×5=
②306×6=
③520×8=
④314+569= 验算:
⑤610-278= 验算:
82-12=
320+20=
54+16=
600-240=
220×3=
150×4=
96×5≈
397×4≈
100÷5= 28×2= 4×900= 600÷2=
140×3= 240÷8= 40×5= 0×19=
①4×75=
②216×3=
③7×254=
④650×6=
⑤405×8=
⑥7×840=
7.4-5.9=
6.8+3.6=
5.4+6.7=
9.6+2.7=
10.8-3.5=
6.4+8.2=
10.7+2.2=
13.5+6.5=
9.6-3.9=
5.82+7.63=
4.4+8.92=
12.56-9.33=