问题
解答题
直接写得数.
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答案
3.14×7=21.98; | 52×101=5252; | 6π=18.84; | 62-20=42; | 402-302=100; |
b×b=b2; | 3.14×302=948.28; | 3.14×42=131.88; | 12.5×32=400; | b+b=2b. |
直接写得数.
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3.14×7=21.98; | 52×101=5252; | 6π=18.84; | 62-20=42; | 402-302=100; |
b×b=b2; | 3.14×302=948.28; | 3.14×42=131.88; | 12.5×32=400; | b+b=2b. |