0.25×2.7×40 38.5÷1.25÷8
7.38× 2.4+2.4×2.62 (4.32+2.48)÷1.6
1÷= = 1.1+0.11= 2.4×50%= 0.24÷0.8=
= 8×= 10﹣0.99= 0.22= 4×25%÷4×25%=