21.5÷0.5×6
5.3×4.72+0.53×52.8
0.175÷0.25÷0.4
0.1-0.01=
0.21÷0.3=
0.67+0.3=
0.24×5=
0.9×60=
0.42=
4b+3b-2b=
0.5×4÷0.5×4=
①12.5×3.2
②6.45×5.8-6.45×1.8
③0.25×99
④0.28÷0.7×1.5
⑤23.9×0.25×8
⑥7.6×10.1
①2800÷25÷4
②125×27×8
③672÷[3×(201-194)]
④312×7+88×7
⑤358+479+42+121
⑥92×101-92
7.38×2.17.38 8.74÷0.978.74
3.2÷0.13.2×10 0.67×0.670.67÷0.67
5×120=600
54+80=134