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速算与巧算![26×(6-2.5)÷0.5-25]×0.2 1993×20002000-2000×1993199379.
题目内容:
速算与巧算!
[26×(6-2.5)÷0.5-25]×0.2
1993×20002000-2000×19931993
79.31×0.6783×0.25+23.56+6.783×7.931×0.75-0.125×0.7931×67.83×8
987×19861986-1986×19871987
6.8×0.32+0.32×4.2-8÷25
28.67×67+3.2×286.7+573.4×0.05
0.25×4.5×6.4×1250
速算与巧算!
[26×(6-2.5)÷0.5-25]×0.2
1993×20002000-2000×19931993
79.31×0.6783×0.25+23.56+6.783×7.931×0.75-0.125×0.7931×67.83×8
987×19861986-1986×19871987
6.8×0.32+0.32×4.2-8÷25
28.67×67+3.2×286.7+573.4×0.05
0.25×4.5×6.4×1250
[26×(6-2.5)÷0.5-25]×0.2
1993×20002000-2000×19931993
79.31×0.6783×0.25+23.56+6.783×7.931×0.75-0.125×0.7931×67.83×8
987×19861986-1986×19871987
6.8×0.32+0.32×4.2-8÷25
28.67×67+3.2×286.7+573.4×0.05
0.25×4.5×6.4×1250
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