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1. 直接写出得数。(每题 1★)
$13×3= $ $17×2= $ $99÷9= $ $13×5= $
$2×23= $ $73×2= $ $29×5= $ $24÷30= $
$255÷3= $ $3×47= $ $87÷3= $ $4×10.1= $
$18×40= $ $99÷3= $ $3×55= $ $52÷13= $
$1.68+0.32= $ $8.1×20= $ $8.5÷1.7= $ $1.23÷3= $
$13×3= $ $17×2= $ $99÷9= $ $13×5= $
$2×23= $ $73×2= $ $29×5= $ $24÷30= $
$255÷3= $ $3×47= $ $87÷3= $ $4×10.1= $
$18×40= $ $99÷3= $ $3×55= $ $52÷13= $
$1.68+0.32= $ $8.1×20= $ $8.5÷1.7= $ $1.23÷3= $
答案
39 34 11 65 46 146 145 0.8 85 141 29 40.4 720 33 165 4 2 162 5 0.41
2. 列竖式计算。(每题 2★)
$3.2×6.75= $ $52.65÷13= $ $4.68÷1.8= $
$5.04×28= $ $2.03÷0.58= $ $38.7÷0.45= $
$3.2×6.75= $ $52.65÷13= $ $4.68÷1.8= $
$5.04×28= $ $2.03÷0.58= $ $38.7÷0.45= $
答案
21.6 4.05 2.6 141.12 3.5 86(竖式略)
3. 计算下面各题,能简算的要简算。(每题 2★)
$62.3+45.9÷0.9$ $5.9×8-49×0.8$ $2.5×(0.32÷0.4)$
$62.3+45.9÷0.9$ $5.9×8-49×0.8$ $2.5×(0.32÷0.4)$
答案
113.3 8 2
