①323×3=
②142×4=
③905×6=
④360×4=
⑤287×3=
⑥365×9=
30×2= 4×20= 10×7= 2×40=
69×3= 90×4= 50×2= 50×7=
24×2= 12×3= 30×9= 60×5=
23×2=
80-26=
16×5=
53+28=
54+45=
71-28=
83×3=
78+822=
88+16=
600-340=
710×8=
189×0=
76-47=
50×4=
330+48=
206×5=
=
1-=
-=
600-187≈
392+514≈
198×6≈
413×5≈
476+233= 271×7= ☆900- 643=验算:
205×5= 164×6= ☆405+ 647=验算:
400-245+517=
825-330-215=
236+148+150=
①279+645=
*② 467-264=
③ 405×3=
④ 190×6=
5×424×5 52×6300
102×7108×6 508×73600
0.68+19.6= = 0.56÷0.4= 0.125×8=
12= 0.22×200= 100﹣0.86= =