180÷6= += ÷3= ×=
6﹣3.3= 2.2+3.57= ﹣= 39.5÷8≈(估算)
0.125×4= ×12= := 8×÷8×=
11﹣ = + = ÷ = 703+298≈
32×30%= 7.2× = 3.63+5.37= ×7÷ ×7=
=
1﹣0.01=
1+2.5%=
3.3﹣=
1÷0.25= 15×60= 72×25%=
1.1-0.01= 12÷ =
24×( )=
15+8= ﹣0.3= 13×0.6= 2.8÷0.7=
×= ÷2= += 52=
5.63-3= 0.5× = +0.75= 3.6÷60%=
4× ÷4× = 0.22= 0.25×16= 0.1+99×0.1=