A:6.67×1011N•m2/kg2
B:6.67×10﹣10N•m2/kg2
C:6.67×10﹣11N•m2/kg2
D:9.80N/kg
4×9=____
7×3=____
25-8=____
9×9-50=____
32-0=____
80-4=____
55+32=____
8×5+40=____
50-30=____
6×3=____
60-18=____
4+5×6=____
36+37=____
65-18=____
8×9=____
90-(32+18)=____