①18+0.44×2.5
②9.76-1.46-2.54
③10.4×2.9+2.1×10.4
④13.25-5.07+6.75
⑤8.75×6.3-39
⑥125×0.88×0.9
0.4×100=
2.8×5=
3.4-1.6=
78×21≈
3.2+0.8=
6-1.7=
0.3+0.47=
3.6÷100=
300÷60=
322÷80≈
0.03+0.52= 3-0.3= 2.5×0.4= 0.4×0.7=
8.5×10=
6.013×100=
63÷10=
0.9÷100=
2.09×1000=
9÷1000=
30.9÷100=
0.889×100=
①0.75-0.4+-0.4
②1.5-2×(0.8-0.6)
③24×3×(+0.25+0.55)
④25×17×24
①99×38+38
②25×125×8×4
③87×101
④3200÷4÷25
⑤88×125
⑥17×23-23×7
C=S=