⑴90200009200000 ⑵28亿2800000000
⑶125×80250×40 ⑷10个一百万1亿
0.9+1.3= 4.8-1.6= 2.5+6.5= 1-0.7=
29÷100= 7.01×1000= a×8= 9×b-2×b=
0.69×10=
7.6﹣5=
68.6+1.63=
10﹣4.1=
1﹣0.75=
11.8+8.2=
3.12×100=
1.2×0.5=
72×2=
3500÷7=
0.12×1000=
5.6÷100=
6.4+0.9=
4.03+5.7=
5.5﹣2=
1﹣0.02=
50×8÷25=
24+16÷4=
6.286.28÷10 5.44+4.5610.2
8.88.8×2.5 8.6×00+8.6
5+2=68 43+7=522