07整數四則計算04簡化計算(選擇01)
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(1). a=859×789,b=858×790,請比較a、b兩數的大小。提示:a=(858+1)×789,b=858×(789+1)
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(2). 計算「2299+3084-299」,所得的答案是下列何者? 
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(3). 45678+12359+37641=45678+□,□中應該填入多少?
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(4). 計算「79+23+721」的答案是多少?
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(5). 456×235×123□(456×235)×123,□中應該填入什麼符號?
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(6). 計算「821×125÷821×8」的結果會是下列何者?
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(7). 下面哪一個算式的答案與「1000×25×4÷10」的相同?
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(8). 算式「201×99」的答案是下列何者?
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(9). 953-299-91=953-300-□,□中要填入多少?
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(10). 下面哪一個算式的答案與「9+234+31」的相同?
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(11). 計算(3000+2998+2996+……+6+4+2)-(1+3+5+……+2997+2999)=?
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