17×40＝680, －63＝37, 3.2＋1.68＝4.88, 2.8×0.4＝ 1.12
14－7.4＝6.6, 1.92÷0.04＝48, 0.32×500＝160, 0.65＋4.35＝ 5
10－5.4＝4.6, 4÷20＝0.2, 3.5×200＝700, 1.5－0.06＝1.44
0.75÷15＝0.05, 0.4×0.8＝0.32, 4×0.25＝1, 0.36＋1.54＝2
1.01×99＝99.99, 420÷35＝12, 25×12＝300, 135÷0.5＝270
3/4 + 1/4 =1, 2 + 4/9 =22/9, 3 – 2/3 =7/3, 3/4 – 1/2= 1/4
1/6 + 1/2 -1/6 =1/2, 7.5-(2.5+3.8)=1.2, 7/8 + 3/8 =5/4
3/10 +1/5 =1/2, 4/5 – 7/10 =1/10, 2 – 1/6 -1/3 =1.5
0.51÷17＝0.03, 32.8＋19＝51.8, 5.2÷1.3＝4, 1.6×0.4＝ 0.64
4.9×0.7＝3.43, 1÷5＝0.2, 6÷12＝0.5, 0.87－0.49＝0.38
10.6.25+3.85-2.125+3.875
11.9-2456*21
12.0.5/11.5-4*2.75
13.1/2×3/5
14.3.375+5.75+2.25+6.625
15.1001－9036÷18
16.3.8×5.25+14.5
17.2.1*4.3+5.7*2.1
321/32=10
25×20=
4÷20=
3÷1.5=
100-63=
3.2+1.68=
48×0.02=
160+4.5=
7.8+0.9=
1.53-0.7=
75÷15=
420÷35=
25×12=
500-68=
13.5÷5=
104+79=
402×5=
150÷75=
13×60=
180-65=
24.5+2.7=
7.28÷0.7=
96-58=
45×80=
10-5.4=
8×0.5=
17×40=
48+39=
95÷1.9=
2.8×0.4=
10.6-5.2=
92÷1.4=
0.32×50=
150÷0.75=
1.48÷1.2=
1.1×99=
8×1.25=
9.8÷0.14=
531-102=
362-97=
236+98=
69+0.71=
2.8×0.5=
64÷0.16=
6.3-5.9=
2.5+8.04=
4000×0.22=
47÷0.001=
18.5+0.9=
10.8-1.6=
01÷0.5=
8×0.25=
66+0.44=
5.85-0.34=
25×5×8=
8.6÷0.4÷5=
120-183=
04×1500=
0.18÷50=
10.6+5.8+1.4=
125×0.2=
9+3.7+2.1=
9.2×0.25×4=
2.07-0.65-1.35=
5.2÷8÷0.125=
8×0.2×0.5=
2+3.8-2.8=
8÷（0.4×0.2）=
4+0.62+0.28=
25×（40+100）=
7×1.3+7×6.7（0.66+0.12）÷6=
7.5-（2.5+3.8）=
05+0.05×99=
108-3.9-4.1=
3（10+0.5）=
32+5.8+0.68=
100×0.65+100=
2+3.8-2.8=
2÷0.125÷8=