89×99+89=
52×15－5×52=
55×102=
89×32+89×68=
125×64=
45×25+75×45=
23.5－2.8－7.2=
55×99=
58.65－(3.2+8.65)=
99×125×8=
3200÷25÷4=
250÷8×4=
44×12－88=
125×24=
0.134+2.66+0.866=
7.5＋4.9－6.5=
3.07－0.38－1.62=
1.29＋3.7＋2.71＋6.3=
8－2.45－1.55=
7.6×0.8＋0.2×7.6=
0.85×199=
0.25×8.5×4=
1.28×8.6＋0.72×8.6=
12.5×0.96×0.8=
10.4－9.6×0.35=
0.8×（4.3×1.25）=
3.12＋3.12×99=
28.6×101－28.6=
14－7.32－2.68=
2.64＋8.67＋7.36＋11.33=
2.31×1.2×0.5=
（2.5－0.25）×0.4=
9.16×1.5－0.5×9.16=
3.6－3.6×0.5=