口算．
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(1)4 ＋6＋3= |
(2)8 ×8－6= |
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(3)4 ×5－2= |
(4)9 ×6＋8= |
口算．
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(1)48 ÷6= |
(2)7 ×9= |
|
(3)40 ÷5= |
(4)28 ÷7= |
口算．
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(1)6 ×7= |
(2)54 ÷6= |
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(3)54 ＋26= |
(4)54 －26= |
口算．
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(1)81 ÷9= |
(2)9 ×7= |
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(3)90 ÷10= |
(4)7 ×6= |
口算．
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(1)6 ×9= |
(2)42 ÷6= |
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(3)3 ×6= |
(4)54 ÷9= |
直接写出结果．
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(1)0.25×400= |
(2)0.12÷0.6= |
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(3)2 －0.35= |
(4)5.63 ＋4.37= |
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(5)6.8 －1.32－2.68= |
(6)4.14 ＋2.7＋0.86= |
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(7)2.42×10÷0.01= |
(8)25×0.24×0.4= |
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(9)4.56×0÷0.25= |
(10)0.24÷0.8÷0.01= |
计算．
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(1)13x ＋8x= |
(2)2b －1.5b= |
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(3) a＋3a= |
(4)5.7x －3x= |
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(5)x ＋0.5x= |
(6)6x －2.4x= |
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(7)7.5x －2.6x= |
(8)3.6x ＋2x= |
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(9)4x ＋3x－5x= |
(10)9x ＋7x＋2.5x= |
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(11)4 a－3a＋5.6a= |
直接写出结果．
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(1)0.5 ×200= |
(2)0.6 ×0.12= |
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(3)2 ×0.35= |
(4)0.63 ＋0.35= |
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(5)2.1 －0.45－0.55= |
(6)3.46 ＋0.25＋0.54= |
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(7)5.01 ×100×0.01= |
(8)50 ×0.46×0.2= |
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(9)7.6 ×0×6.85= |
(10)2.24 ×99＋2.24= |
直接写出得数．
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(1)3.24 ×10= |
(2)2.25 ×100= |
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(3)0.146 ×1000= |
(4)8.5 ×100= |
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(5)0.04 ×10= |
(6)3.64 ×10= |
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(7)4.036 ×10= |
(8)0.2 ×100= |