综合算式:
6.09= 3.16000=
1.3×1.4=
×=0.182
×=0.0182
×0.14=1.82
37+3=3+ a+b=b+ (a+b)+56=a+(b+)
5.26+7+1.74 27.85-(7.85+3.9)
5.6+2.7-3.6 10-2.75-3.25
15.25-3.1+0.65-4.9