520÷5= 173+137= 2.03×1000= 33.4÷100×10=
24×5= 23×45×0= 44-44÷44= 24×5÷24×5=
3.25+6.75=
a×a=
5a+7a=
9×99+9=
5.4+0.6=
0.57×1000=
24-19+24+19=
8.8-0.7=
90÷100=
6.25-0.8=
3.26÷1000×100=
26×101-26=
5×1.8= 18.9+1.14= 1-0.67= 2.4×0.2×5=
0.8×0.5= 7.6-6.7= 3.6×70= 4.9+5.1×0.1=
0.05+0.5= 6.4+0.6= 0.125×100=
1-0.44= 5.61-5.6= 9÷1000=
4×25÷25×4= 3.5+6.5×10=
①836-192÷8×16
②1.4÷(1.4+0.7)
③0.8×0.4×12.5×0.25
④ ÷6+ ÷20
⑤14×19×( + )
⑥ ÷[( + )÷ ]