20.96-11.38-7.62
18.2-0.98+3.27
87.4-(63.7-29.56)
24×3=
15×40=
75+25÷5=
100-65+35=
840÷40=
0÷99=
101×27=
639-247-139 =
28.72+15.5-8.72 103×13 5.02+13.38+30.96
①3.63-1.25+17.37-0.75 ②67.7-6.3+3.7 ③4600÷25÷4④9.54-(3.54+2.62) ⑤96×37+37×3+37 ⑥11×56+121×4
[510-(510-247)]÷13 81×102 67×99+67
16.53-2.61+3.47-8.39 1200÷25÷4 10-1.36-8.64