12
×12= 2.5-1.7= 0.5×(2.6-2.4)=
2.2+3.57= 3.25×4= 0.9×(99+0.9)=
① × = ②24× = ③3× = ④1﹣ =
⑤ ÷2= ⑥2÷ = ⑦ ÷ = ⑧0÷ =