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1 直接写出得数。(每题1分,共20分)
$35×40= $ $836÷4= $ $30×57= $ $918÷9= $
$29×80= $ $405÷5= $ $29×50= $ $515÷5= $
$57×67\approx$ $482÷6\approx$ $53×81\approx$ $564÷8\approx$
$180÷2÷5= $ $45×2÷5= $ $88÷2×30= $ $59×10×20= $
$62.2+5.8= $ $33.6-11.9= $ $17.5+30.8= $ $78.1-19.8= $
$35×40= $ $836÷4= $ $30×57= $ $918÷9= $
$29×80= $ $405÷5= $ $29×50= $ $515÷5= $
$57×67\approx$ $482÷6\approx$ $53×81\approx$ $564÷8\approx$
$180÷2÷5= $ $45×2÷5= $ $88÷2×30= $ $59×10×20= $
$62.2+5.8= $ $33.6-11.9= $ $17.5+30.8= $ $78.1-19.8= $
答案
1400 209 1710 102
2320 81 1450 103
4200 80 4000 70
18 18 1320 11800
68 21.7 48.3 58.3
2320 81 1450 103
4200 80 4000 70
18 18 1320 11800
68 21.7 48.3 58.3
2 列竖式计算。(每题3分,共18分)
$47×58= $ $197÷8= $ $973÷7= $
$55-32.6= $ $18.7+43.6= $ $90.5-34.8= $
$47×58= $ $197÷8= $ $973÷7= $
$55-32.6= $ $18.7+43.6= $ $90.5-34.8= $
答案
竖式略
2726 24……5 139
22.4 62.3 55.7
2726 24……5 139
22.4 62.3 55.7
3 递等式计算。(每题4分,共12分)
$12×23-35.9$ $(13.7+35.3)×9$ $91-17.8-17.8$
$12×23-35.9$ $(13.7+35.3)×9$ $91-17.8-17.8$
答案
240.1 441 55.4
