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4.5x12.6-3.6x4.5+4.5简便计算还有45.6x6.7+4.56x31+0.456x20今天答完

题目详情
4.5x12.6-3.6x4.5+4.5简便计算
还有45.6x6.7+4.56x31+0.456x20今天答完
▼优质解答
答案和解析
4.5×12.6-3.6×4.5+4.5
=4.5×(12.6-3.6+1)
=4.5×10
=45
45.6×6.7+4.56×31+0.456×20
=4.56×67+4.56×31+4.56×2
=4.56×(67+31+2)
=4.56×100
=456