题目内容

625÷25-150÷50．
分析：根据题意，先算除法，再算减法．
解答：解：625÷25-150÷50，
=25-3，
=22．
点评：此题主要考查整数的四则混合运算的运算顺序，然后再进一步计算．
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15.15÷15= 0.2×0.3= 1.34×4×2.5= 0.9÷4.5=

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