2×7.8÷3.9 2.1÷(1.2-0.5)
① 9.7-22.78÷3.4
② 7.3÷1.25÷0.8
③ 5.6×10.1
④ 6.1×0.64+0.36×6.1
56÷100=
0.3×1.5=
0.25×0.4=
3.2+0.8=
8×1.25=
0.72÷0.8=
0.81÷3=
0.89-0.5=
1.98÷9=
⑴x﹣2.6=8.4
⑵2x+1.2×6=20
⑶5.3x﹣1.3x=12.8
⑷(x﹣0.7)÷0.4=9.5
7.62+2.5×8 9.8÷1.4-1.5
2.5×71.71×0.4 1.25×9.93-1.93×1.25
3.9×0.013.9÷100 1.231.233 2.466