题目内容
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口算．
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答案：0.4；7；41；0.75
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相关题目
口算．
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(1)4 ×6－20= |
(2)34 ＋63÷9= |
(3)81 ÷9×4= |
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(4)72 ÷8－9= |
(5)15 ＋5×6= |
(6)56 －30＋6= |
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(7)(26 ＋9)÷7= |
(8)8 ×(35－30)= |
(9)63 ÷(56÷8)= |
口算
 += |  - = |  +- = | 3+ = |
 + = | 1- - = |  + += | 4-= |
=
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=口算．
1÷ = | 4.8÷2.4= | 9600÷30= | 84%÷4= |
| 52×0.4= | 21.7÷0.7= |  -= |  + = |
| b×0= | 0.73×99+0.73= | 84÷0.7= | 2+1÷3= |