星级口算
天天练

六年级数学下

难易等级：

练习7 数的运算（一）

用时：____分____秒 错误：____个

A组 常规口算题

$12\; +\; 18\; =$

$0.63\; +\; 1.4\; =$

$\backslash frac\{1\}\{2\}\; +\; \backslash frac\{1\}\{3\}\; =$

$36\; -\; 9\; =$

$4\; +\; 2.85\; =$

$\backslash frac\{3\}\{10\}\; +\; \backslash frac\{7\}\{10\}\; =$

$30\; +\; 25\; =$

$6.52\; -\; 4\; =$

$\backslash frac\{1\}\{2\}\; -\; \backslash frac\{1\}\{3\}\; =$

$28\; +\; 9\; =$

$20\; -\; 6.34\; =$

$\backslash frac\{1\}\{8\}\; +\; \backslash frac\{7\}\{8\}\; =$

$45\; -\; 30\; =$

$9.2\; +\; 1.8\; =$

$\backslash frac\{8\}\{9\}\; -\; \backslash frac\{1\}\{9\}\; =$

$8400\; -\; 8000\; =$

$12.48\; -\; 0.48\; =$

$1\; -\; \backslash frac\{2\}\{5\}\; =$

$9\; +\; 36\; =$

$32\; -\; 1.5\; =$

$\backslash frac\{3\}\{4\}\; +\; \backslash frac\{1\}\{2\}\; =$

$65\; -\; 6\; =$

$10\; +\; 4.58\; =$

$\backslash frac\{11\}\{12\}\; -\; \backslash frac\{1\}\{12\}\; =$

$32\; -\; 21\; =$

$7.21\; +\; 2.79\; =$

$\backslash frac\{11\}\{14\}\; -\; \backslash frac\{1\}\{2\}\; =$

$20\; +\; 40\; =$

$12\; -\; 7.5\; =$

$\backslash frac\{3\}\{5\}\; +\; \backslash frac\{1\}\{5\}\; =$

$100\; +\; 60\; =$

$3.5\; +\; 2.6\; =$

$\backslash frac\{1\}\{3\}\; -\; \backslash frac\{1\}\{5\}\; =$

$15\; -\; 9\; =$

$4.68\; -\; 0.68\; =$

$46\; +\; 18\; =$

$8.1\; +\; 0.9\; =$

$300\; +\; 20\; =$

$9.32\; -\; 1.8\; =$

$81\; -\; 22\; \backslash approx$

$4.6\; -\; 1.7\; =$

$91\; -\; 28\; \backslash approx$

B组 变式口算题

1. 根据加法算式写出两道减法算式。

$120\; +\; 58\; =\; 178$

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$98\; +\; 49\; =\; 147$

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2. 根据减法算式写出一道减法算式和一道加法算式。

$310\; -\; 150\; =\; 160$

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$152\; -\; 58\; =\; 94$

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