72.5-2.07÷23
5.07×3.6+9.4
4.61×0.9÷4.61
7.9×(3.64÷2.6)
4.2+3.6÷60
0.2×[(0.65+0.75)÷0.25]
2×7.8÷3.9 2.1÷(1.2-0.5)
1.6+8.4×0.3
4.16÷0.04-7.38
42-68.8÷8.6×1.5
2.25×(4+0.8)
8.23×9.9+0.823
2002 2200 2020 2220 2022 222
<<<<<
5007 5700 5070 5079 570 750
>>>>>
×
*
30×50
30×6
50×8
8×6