7.2+2.8=10 0.9÷0.01=90 3.5+7.6=11.1 3×0.2×0.5=0.3
0.96÷0.3=3.2 1.5×0.4=0.6 7÷0.25=28 2.5×0.7×0.8=1.4
8-2.5=5.5 16÷1.6=10 5.6×1.01=5.656 8×（2.5+0.25）=22
0.36+0.64=1 64.32÷16=4.02 72.8÷0.8=91 8.4×0.2+1.6×0.2=2
8.4÷4.2=2 0.05×0.8=0.04 2.56-0.37=2.19 1.25×0.8×0.5=0.5
12×2.5=30 1.23×3=3.69 3.2÷1.6=2 3.5+3.5×3=14
19.6÷2=9.8 8.8÷2.2=4 3.9+2.03=5.93 7.2×0.3+2.8×0.3=3
13.8+9.9=23.7 2.4×2.5=6 0.75×4=3 （1.5+0.25）×4=7
4.2÷0.1=42 4.2÷3.5=1.2 2.14-0.9=1.24 27+456+73=556
12÷0.3=40 2.87÷0.7=4.1 13÷4=3.25 24÷4+56÷4=20