2=0.87-0.49=17×40=103.2+1.68=2.8×0.4=14-7.4=1.92÷0.04=0.32×500=0.65+4.35=10-5.4=4÷20=3.5×200=1.5-0.06=0.75÷15=0.4×0.8=4×0.25=0.36+1.54=1.01×99=+=3:4=1:5=19:76=16:32=18:24=6:4=2:3=4:8=15:5=55:11=56:28=78:39=0.01:7=1:0.3=9:0.9=4:1.6=50:4=6:4=0.4:0.7=0.3:5=0.1:3.4=0.36:0.18=9:12=4.5:6=9:4.5=0.6:3=6:24=2:6=12:24=16:18=10:6=1.5:30=3.14×2=3.14×10=3.14×5=3.14×8=3.14×6=3.14×7=3.14×9=3.14×3=3.14×4=12.56÷3.14=5.7÷3.14=9.42÷3.14=25.12÷3.14=628÷3.14=188.4÷3.14=18.84÷3.14=3.14×1=3.14×2=3.14×3=2×3.14×5=2×3.14×4.5=9.42÷3.14÷3=2×3.14×2.5=4×3.14×5=15.7÷3.14÷5=2×3.14×2=0.4-0.31=1.4×0.6=二、将下列分数先化成小数,再化成百分数。()=())=()()=()=()=()()=()()=()()=()()=()()=()()=()()=()()=()三、巧算。12-6.2-3.8=8.9+3.8+1.1=0.25×3+0.25=12.5×9-12.5=1.24+0.36÷6=0.25×0.7×4=25×3.9×0.4=1.25×7+1.25=5000×2.25%×80%=3.14×1.25×0.2×4=125×16=0.875×24=
全文预览
