55+37= 80-26= 1400-800= 62-39= 2×2 10= 9×300= 82×0= 203×3=

30×7= 40×8= 8 10-700= 208- 100= 50+350= 34×2= 64÷8= 300+560= 400+600= 102+320= 320×3= 12×5=

1- 1/3= 2/4- 1/4= 3/9+5/9= 5/7-2/7= 3/5+2/5=

2. Vertical calculation.

325+464= 3 10-270= 1 19×5= 703×6= 560×7= 68÷8=

5 16-278= 406×3= 6 12÷6= 26+998= 65×28= 5 56÷9=