44×20=
60×31=
50×40=
17×30=
800÷4=
180÷9=
360÷3=
735÷7=
0.6+0.3=
0.6+0.8=
5.6+2.4=
26+4.4=
0.6-0.3=
1-0.8=
7.7-2.2=
6.1-3.3=
5.8-3.6=
125÷5=
40×50=
32×59≈
306÷6=
0÷1=
17-4.8=
97÷5≈
102×5=
6.3+8.7=
108÷6-6=
494÷7≈
28×50=
18×12=
20×14÷7=
61.9+38.3≈
问题:
解答: